diff --git a/nest-cli.json b/nest-cli.json
index 56167b3..2d39856 100644
--- a/nest-cli.json
+++ b/nest-cli.json
@@ -1,4 +1,8 @@
 {
   "collection": "@nestjs/schematics",
-  "sourceRoot": "src"
+  "sourceRoot": "src",
+  "compilerOptions": {
+    "plugins": ["@nestjs/graphql"],
+    "introspectComments": true
+  }
 }
diff --git a/package-lock.json b/package-lock.json
index 5a95caf..45393ff 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2284,6 +2284,15 @@
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+      "resolved": "https://registry.npmjs.org/are-we-there-yet/-/are-we-there-yet-1.1.5.tgz",
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+      "resolved": "https://registry.npmjs.org/class-transformer/-/class-transformer-0.3.2.tgz",
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@@ -4855,6 +4931,23 @@
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+        "libphonenumber-js": "^1.9.7",
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@@ -5318,6 +5421,11 @@
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+      "resolved": "https://registry.npmjs.org/delegates/-/delegates-1.0.0.tgz",
+      "integrity": "sha1-hMbhWbgZBP3KWaDvRM2HDTElD5o="
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@@ -6459,6 +6577,54 @@
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@@ -8166,6 +8350,11 @@
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@@ -8714,6 +8928,11 @@
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@@ -8754,12 +8973,102 @@
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+          }
+        },
+        "minizlib": {
+          "version": "1.3.3",
+          "resolved": "https://registry.npmjs.org/minizlib/-/minizlib-1.3.3.tgz",
+          "integrity": "sha512-6ZYMOEnmVsdCeTJVE0W9ZD+pVnE8h9Hma/iOwwRDsdQoePpoX56/8B6z3P9VNwppJuBKNRuFDRNRqRWexT9G9Q==",
+          "requires": {
+            "minipass": "^2.9.0"
+          }
+        },
+        "rimraf": {
+          "version": "2.7.1",
+          "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.7.1.tgz",
+          "integrity": "sha512-uWjbaKIK3T1OSVptzX7Nl6PvQ3qAGtKEtVRjRuazjfL3Bx5eI409VZSqgND+4UNnmzLVdPj9FqFJNPqBZFve4w==",
+          "requires": {
+            "glob": "^7.1.3"
+          }
+        },
+        "semver": {
+          "version": "5.7.1",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
+          "integrity": "sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ=="
+        },
+        "tar": {
+          "version": "4.4.13",
+          "resolved": "https://registry.npmjs.org/tar/-/tar-4.4.13.tgz",
+          "integrity": "sha512-w2VwSrBoHa5BsSyH+KxEqeQBAllHhccyMFVHtGtdMpF4W7IRWfZjFiQceJPChOeTsSDVUpER2T8FA93pr0L+QA==",
+          "requires": {
+            "chownr": "^1.1.1",
+            "fs-minipass": "^1.2.5",
+            "minipass": "^2.8.6",
+            "minizlib": "^1.2.1",
+            "mkdirp": "^0.5.0",
+            "safe-buffer": "^5.1.2",
+            "yallist": "^3.0.3"
+          }
+        },
+        "yallist": {
+          "version": "3.1.1",
+          "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.1.1.tgz",
+          "integrity": "sha512-a4UGQaWPH59mOXUYnAG2ewncQS4i4F43Tv3JoAM+s2VDAmS9NsK8GpDMLrCHPksFT7h3K6TOoUNn2pb7RoXx4g=="
+        }
+      }
+    },
     "node-releases": {
       "version": "1.1.70",
       "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-1.1.70.tgz",
       "integrity": "sha512-Slf2s69+2/uAD79pVVQo8uSiC34+g8GWY8UH2Qtqv34ZfhYrxpYpfzs9Js9d6O0mbDmALuxaTlplnBTnSELcrw==",
       "dev": true
     },
+    "nopt": {
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/nopt/-/nopt-4.0.3.tgz",
+      "integrity": "sha512-CvaGwVMztSMJLOeXPrez7fyfObdZqNUK1cPAEzLHrTybIua9pMdmmPR5YwtfNftIOMv3DPUhFaxsZMNTQO20Kg==",
+      "requires": {
+        "abbrev": "1",
+        "osenv": "^0.1.4"
+      }
+    },
     "normalize-package-data": {
       "version": "2.5.0",
       "resolved": "https://registry.npmjs.org/normalize-package-data/-/normalize-package-data-2.5.0.tgz",
@@ -8785,6 +9094,29 @@
       "resolved": "https://registry.npmjs.org/normalize-path/-/normalize-path-3.0.0.tgz",
       "integrity": "sha512-6eZs5Ls3WtCisHWp9S2GUy8dqkpGi4BVSz3GaqiE6ezub0512ESztXUwUB6C6IKbQkY2Pnb/mD4WYojCRwcwLA=="
     },
+    "npm-bundled": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/npm-bundled/-/npm-bundled-1.1.1.tgz",
+      "integrity": "sha512-gqkfgGePhTpAEgUsGEgcq1rqPXA+tv/aVBlgEzfXwA1yiUJF7xtEt3CtVwOjNYQOVknDk0F20w58Fnm3EtG0fA==",
+      "requires": {
+        "npm-normalize-package-bin": "^1.0.1"
+      }
+    },
+    "npm-normalize-package-bin": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/npm-normalize-package-bin/-/npm-normalize-package-bin-1.0.1.tgz",
+      "integrity": "sha512-EPfafl6JL5/rU+ot6P3gRSCpPDW5VmIzX959Ob1+ySFUuuYHWHekXpwdUZcKP5C+DS4GEtdJluwBjnsNDl+fSA=="
+    },
+    "npm-packlist": {
+      "version": "1.4.8",
+      "resolved": "https://registry.npmjs.org/npm-packlist/-/npm-packlist-1.4.8.tgz",
+      "integrity": "sha512-5+AZgwru5IevF5ZdnFglB5wNlHG1AOOuw28WhUq8/8emhBmLv6jX5by4WJCh7lW0uSYZYS6DXqIsyZVIXRZU9A==",
+      "requires": {
+        "ignore-walk": "^3.0.1",
+        "npm-bundled": "^1.0.1",
+        "npm-normalize-package-bin": "^1.0.1"
+      }
+    },
     "npm-run-path": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/npm-run-path/-/npm-run-path-4.0.1.tgz",
@@ -8794,11 +9126,27 @@
         "path-key": "^3.0.0"
       }
     },
+    "npmlog": {
+      "version": "4.1.2",
+      "resolved": "https://registry.npmjs.org/npmlog/-/npmlog-4.1.2.tgz",
+      "integrity": "sha512-2uUqazuKlTaSI/dC8AzicUck7+IrEaOnN/e0jd3Xtt1KcGpwx30v50mL7oPyr/h9bL3E4aZccVwpwP+5W9Vjkg==",
+      "requires": {
+        "are-we-there-yet": "~1.1.2",
+        "console-control-strings": "~1.1.0",
+        "gauge": "~2.7.3",
+        "set-blocking": "~2.0.0"
+      }
+    },
     "nullthrows": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/nullthrows/-/nullthrows-1.1.1.tgz",
       "integrity": "sha512-2vPPEi+Z7WqML2jZYddDIfy5Dqb0r2fze2zTxNNknZaFpVHU3mFB3R+DWeJWGVx0ecvttSGlJTI+WG+8Z4cDWw=="
     },
+    "number-is-nan": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/number-is-nan/-/number-is-nan-1.0.1.tgz",
+      "integrity": "sha1-CXtgK1NCKlIsGvuHkDGDNpQaAR0="
+    },
     "nwsapi": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/nwsapi/-/nwsapi-2.2.0.tgz",
@@ -8984,6 +9332,11 @@
         "url-parse": "^1.4.3"
       }
     },
+    "os-homedir": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/os-homedir/-/os-homedir-1.0.2.tgz",
+      "integrity": "sha1-/7xJiDNuDoM94MFox+8VISGqf7M="
+    },
     "os-name": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/os-name/-/os-name-4.0.0.tgz",
@@ -8997,8 +9350,16 @@
     "os-tmpdir": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/os-tmpdir/-/os-tmpdir-1.0.2.tgz",
-      "integrity": "sha1-u+Z0BseaqFxc/sdm/lc0VV36EnQ=",
-      "dev": true
+      "integrity": "sha1-u+Z0BseaqFxc/sdm/lc0VV36EnQ="
+    },
+    "osenv": {
+      "version": "0.1.5",
+      "resolved": "https://registry.npmjs.org/osenv/-/osenv-0.1.5.tgz",
+      "integrity": "sha512-0CWcCECdMVc2Rw3U5w9ZjqX6ga6ubk1xDVKxtBQPK7wis/0F2r9T6k4ydGYhecl7YUBxBVxhL5oisPsNxAPe2g==",
+      "requires": {
+        "os-homedir": "^1.0.0",
+        "os-tmpdir": "^1.0.0"
+      }
     },
     "p-each-series": {
       "version": "2.2.0",
@@ -9593,6 +9954,24 @@
         "unpipe": "1.0.0"
       }
     },
+    "rc": {
+      "version": "1.2.8",
+      "resolved": "https://registry.npmjs.org/rc/-/rc-1.2.8.tgz",
+      "integrity": "sha512-y3bGgqKj3QBdxLbLkomlohkvsA8gdAiUQlSBJnBhfn+BPxg4bc62d8TcBW15wavDfgexCgccckhcZvywyQYPOw==",
+      "requires": {
+        "deep-extend": "^0.6.0",
+        "ini": "~1.3.0",
+        "minimist": "^1.2.0",
+        "strip-json-comments": "~2.0.1"
+      },
+      "dependencies": {
+        "strip-json-comments": {
+          "version": "2.0.1",
+          "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-2.0.1.tgz",
+          "integrity": "sha1-PFMZQukIwml8DsNEhYwobHygpgo="
+        }
+      }
+    },
     "react-is": {
       "version": "17.0.1",
       "resolved": "https://registry.npmjs.org/react-is/-/react-is-17.0.1.tgz",
@@ -10198,6 +10577,11 @@
         }
       }
     },
+    "sanitizer": {
+      "version": "0.1.3",
+      "resolved": "https://registry.npmjs.org/sanitizer/-/sanitizer-0.1.3.tgz",
+      "integrity": "sha1-1PCvdHXZp7ryqeWmEXGLqheKOeE="
+    },
     "sax": {
       "version": "1.2.4",
       "resolved": "https://registry.npmjs.org/sax/-/sax-1.2.4.tgz",
@@ -10362,8 +10746,7 @@
     "signal-exit": {
       "version": "3.0.3",
       "resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.3.tgz",
-      "integrity": "sha512-VUJ49FC8U1OxwZLxIbTTrDvLnf/6TDgxZcK8wxR8zs13xpx7xbG60ndBlhNrFi2EMuFRoeDoJO7wthSLq42EjA==",
-      "dev": true
+      "integrity": "sha512-VUJ49FC8U1OxwZLxIbTTrDvLnf/6TDgxZcK8wxR8zs13xpx7xbG60ndBlhNrFi2EMuFRoeDoJO7wthSLq42EjA=="
     },
     "signedsource": {
       "version": "1.0.0",
@@ -11851,6 +12234,11 @@
         "spdx-expression-parse": "^3.0.0"
       }
     },
+    "validator": {
+      "version": "11.1.0",
+      "resolved": "https://registry.npmjs.org/validator/-/validator-11.1.0.tgz",
+      "integrity": "sha512-qiQ5ktdO7CD6C/5/mYV4jku/7qnqzjrxb3C/Q5wR3vGGinHTgJZN/TdFT3ZX4vXhX2R1PXx42fB1cn5W+uJ4lg=="
+    },
     "vary": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
@@ -12044,6 +12432,43 @@
       "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.0.tgz",
       "integrity": "sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho="
     },
+    "wide-align": {
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.3.tgz",
+      "integrity": "sha512-QGkOQc8XL6Bt5PwnsExKBPuMKBxnGxWWW3fU55Xt4feHozMUhdUMaBCk290qpm/wG5u/RSKzwdAC4i51YigihA==",
+      "requires": {
+        "string-width": "^1.0.2 || 2"
+      },
+      "dependencies": {
+        "ansi-regex": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-3.0.0.tgz",
+          "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg="
+        },
+        "is-fullwidth-code-point": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz",
+          "integrity": "sha1-o7MKXE8ZkYMWeqq5O+764937ZU8="
+        },
+        "string-width": {
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-2.1.1.tgz",
+          "integrity": "sha512-nOqH59deCq9SRHlxq1Aw85Jnt4w6KvLKqWVik6oA9ZklXLNIOlqg4F2yrT1MVaTjAqvVwdfeZ7w7aCvJD7ugkw==",
+          "requires": {
+            "is-fullwidth-code-point": "^2.0.0",
+            "strip-ansi": "^4.0.0"
+          }
+        },
+        "strip-ansi": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-4.0.0.tgz",
+          "integrity": "sha1-qEeQIusaw2iocTibY1JixQXuNo8=",
+          "requires": {
+            "ansi-regex": "^3.0.0"
+          }
+        }
+      }
+    },
     "windows-release": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/windows-release/-/windows-release-4.0.0.tgz",
diff --git a/package.json b/package.json
index 2b3369f..64e4470 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,11 @@
     "@nestjs/graphql": "^7.9.8",
     "@nestjs/platform-express": "^7.5.1",
     "@nestjs/typeorm": "^7.1.5",
+    "@neuralegion/class-sanitizer": "^0.3.2",
     "apollo-server-express": "^2.19.2",
+    "bcrypt": "^5.0.0",
+    "class-transformer": "^0.3.2",
+    "class-validator": "^0.13.1",
     "graphql": "^15.5.0",
     "graphql-tools": "^7.0.2",
     "js-yaml": "^4.0.0",
diff --git a/src/app.module.ts b/src/app.module.ts
index f83de78..b7362d9 100644
--- a/src/app.module.ts
+++ b/src/app.module.ts
@@ -5,6 +5,7 @@ import { TypeOrmModule } from '@nestjs/typeorm';
 import { AppController } from './app.controller';
 import { AppResolver } from './app.resolver';
 import { AppService } from './app.service';
+import { ProjectsModule } from './projects/projects.module';
 import configuration from './commons/config/configuration';
 
 @Module({
@@ -35,6 +36,7 @@ import configuration from './commons/config/configuration';
       }),
       inject: [ConfigService],
     }),
+    ProjectsModule,
   ],
   controllers: [AppController],
   providers: [AppService, AppResolver],
diff --git a/src/commons/commons.module.ts b/src/commons/commons.module.ts
new file mode 100644
index 0000000..12d0563
--- /dev/null
+++ b/src/commons/commons.module.ts
@@ -0,0 +1,8 @@
+import { Module } from '@nestjs/common';
+import { PasswordConverter } from './services/password-converter';
+
+@Module({
+  providers: [PasswordConverter],
+  exports: [PasswordConverter],
+})
+export class CommonsModule {}
diff --git a/src/commons/entities/app-base-entity.ts b/src/commons/entities/app-base-entity.ts
new file mode 100644
index 0000000..1002875
--- /dev/null
+++ b/src/commons/entities/app-base-entity.ts
@@ -0,0 +1,19 @@
+import { Field, ID, ObjectType } from '@nestjs/graphql';
+import {
+  CreateDateColumn,
+  PrimaryGeneratedColumn,
+  UpdateDateColumn,
+} from 'typeorm';
+
+@ObjectType()
+export class AppBaseEntity {
+  @Field(() => ID)
+  @PrimaryGeneratedColumn('uuid')
+  id: string;
+
+  @CreateDateColumn()
+  createdAt: Date;
+
+  @UpdateDateColumn({ select: false })
+  updatedAt: Date;
+}
diff --git a/src/commons/exceptions/Insufficient-balance.exception.ts b/src/commons/exceptions/Insufficient-balance.exception.ts
new file mode 100644
index 0000000..095ae11
--- /dev/null
+++ b/src/commons/exceptions/Insufficient-balance.exception.ts
@@ -0,0 +1,6 @@
+export class InsufficientBalanceException extends Error {
+  constructor(curr: number, amount: number) {
+    super();
+    this.message = `余额不足。current balance：${curr}，change amount：${amount}`;
+  }
+}
diff --git a/src/commons/exceptions/application.exception.ts b/src/commons/exceptions/application.exception.ts
new file mode 100644
index 0000000..d7f425f
--- /dev/null
+++ b/src/commons/exceptions/application.exception.ts
@@ -0,0 +1,21 @@
+export class ApplicationException extends Error {
+  code: number;
+  error: Error;
+
+  constructor(
+    message:
+      | string
+      | { error?: Error; message?: string | object; code?: number },
+  ) {
+    if (message instanceof Object) {
+      super();
+      this.code = message.code;
+      this.error = message.error;
+      this.message = message.message as any;
+    } else if (typeof message === 'string') {
+      super((message as unknown) as any);
+    } else {
+      super((message as unknown) as any);
+    }
+  }
+}
diff --git a/src/commons/exceptions/duplicate-entity.exception.ts b/src/commons/exceptions/duplicate-entity.exception.ts
new file mode 100644
index 0000000..b27ddb5
--- /dev/null
+++ b/src/commons/exceptions/duplicate-entity.exception.ts
@@ -0,0 +1,35 @@
+import { ValidationError } from '@nestjs/common';
+import { WrongContentException } from './wrong-content.exception';
+
+export interface DuplicateFieldInfo {
+  property: string;
+  value: any;
+  name?: string;
+  message?: string;
+}
+
+export class DuplicateEntityException extends WrongContentException {
+  errorObj: { [p: string]: any; message: ValidationError[] };
+  constructor(exceptionInfo: DuplicateFieldInfo[]) {
+    super(DuplicateEntityException.getValidationError(exceptionInfo));
+  }
+
+  private static getValidationError(
+    exceptionInfo: DuplicateFieldInfo[],
+  ): ValidationError[] {
+    return exceptionInfo.map((item) => {
+      const property: string = item.property;
+      const value: any = item.value;
+      const message: string = item.message
+        ? item.message
+        : `${item.name || ''}已存在相同的值「${item.value}」`;
+      return {
+        property,
+        value,
+        constraints: { duplicate: message },
+        target: undefined,
+        children: [],
+      } as ValidationError;
+    });
+  }
+}
diff --git a/src/commons/exceptions/lock-failed.exception.ts b/src/commons/exceptions/lock-failed.exception.ts
new file mode 100644
index 0000000..62637af
--- /dev/null
+++ b/src/commons/exceptions/lock-failed.exception.ts
@@ -0,0 +1,6 @@
+export class LockFailedException extends Error {
+  constructor(lockId: any) {
+    super();
+    this.message = `加锁失败。目标：${lockId}`;
+  }
+}
diff --git a/src/commons/exceptions/value-out-of-range.exception.ts b/src/commons/exceptions/value-out-of-range.exception.ts
new file mode 100644
index 0000000..70aa213
--- /dev/null
+++ b/src/commons/exceptions/value-out-of-range.exception.ts
@@ -0,0 +1,36 @@
+import { ValidationError } from '@nestjs/common';
+import { WrongContentException } from './wrong-content.exception';
+
+export interface ValueOutOfRangeInfo {
+  property: string;
+  value: any;
+  range: string;
+  name?: string;
+  message?: string;
+}
+
+export class ValueOutOfRangeException extends WrongContentException {
+  errorObj: { [p: string]: any; message: ValidationError[] };
+  constructor(exceptionInfo: ValueOutOfRangeInfo[]) {
+    super(ValueOutOfRangeException.getValidationError(exceptionInfo));
+  }
+
+  private static getValidationError(
+    exceptionInfo: ValueOutOfRangeInfo[],
+  ): ValidationError[] {
+    return exceptionInfo.map((item) => {
+      const property: string = item.property;
+      const value: any = item.value;
+      const message: string = item.message
+        ? item.message
+        : `${item.name || ''}的取值范围应是${item.range}`;
+      return {
+        property,
+        value,
+        constraints: { duplicate: message },
+        target: undefined,
+        children: [],
+      } as ValidationError;
+    });
+  }
+}
diff --git a/src/commons/exceptions/wrong-content.exception.ts b/src/commons/exceptions/wrong-content.exception.ts
new file mode 100644
index 0000000..c8e17ac
--- /dev/null
+++ b/src/commons/exceptions/wrong-content.exception.ts
@@ -0,0 +1,7 @@
+import { UnprocessableEntityException, ValidationError } from '@nestjs/common';
+
+export class WrongContentException extends UnprocessableEntityException {
+  constructor(exceptionInfo: ValidationError[]) {
+    super(exceptionInfo);
+  }
+}
diff --git a/src/commons/filters/all.exception-filter.ts b/src/commons/filters/all.exception-filter.ts
new file mode 100644
index 0000000..e5f202e
--- /dev/null
+++ b/src/commons/filters/all.exception-filter.ts
@@ -0,0 +1,55 @@
+import {
+  ArgumentsHost,
+  Catch,
+  ExceptionFilter,
+  HttpException,
+  HttpStatus,
+} from '@nestjs/common';
+import { EntityNotFoundError } from 'typeorm/error/EntityNotFoundError';
+
+@Catch()
+export class AllExceptionsFilter implements ExceptionFilter {
+  catch(exception: any, host: ArgumentsHost) {
+    const ctx = host.switchToHttp();
+    const response = ctx.getResponse();
+    const request = ctx.getRequest();
+
+    const status =
+      exception instanceof HttpException
+        ? exception.getStatus()
+        : HttpStatus.INTERNAL_SERVER_ERROR;
+
+    if (exception instanceof HttpException) {
+      const ex = exception.getResponse();
+      if (ex instanceof Object) {
+        response.status(status).json({
+          ...ex,
+          timestamp: Date.now(),
+          path: request.url,
+        });
+      } else {
+        response.status(status).json({
+          message: ex,
+          timestamp: Date.now(),
+          path: request.url,
+        });
+      }
+    } else if (exception instanceof EntityNotFoundError) {
+      response.status(HttpStatus.NOT_FOUND).json({
+        message: '资源未找到!',
+        timestamp: Date.now(),
+        path: request.url,
+      });
+    } else {
+      console.error('服务器内部错误');
+      console.error(exception);
+      response.status(HttpStatus.INTERNAL_SERVER_ERROR).json({
+        code: status,
+        timestamp: new Date().toISOString(),
+        message: '服务器内部错误',
+        error: exception,
+        path: request.url,
+      });
+    }
+  }
+}
diff --git a/src/commons/interfaces/available.interface.ts b/src/commons/interfaces/available.interface.ts
new file mode 100644
index 0000000..da78ec6
--- /dev/null
+++ b/src/commons/interfaces/available.interface.ts
@@ -0,0 +1,3 @@
+export interface AvailableInterface {
+  isAvailable: boolean;
+}
diff --git a/src/commons/interfaces/pagination.interface.ts b/src/commons/interfaces/pagination.interface.ts
new file mode 100644
index 0000000..5dbf897
--- /dev/null
+++ b/src/commons/interfaces/pagination.interface.ts
@@ -0,0 +1,6 @@
+export interface PaginationInterface {
+  pageSize?: number;
+  pageIndex?: number;
+  take?: number;
+  skip?: number;
+}
diff --git a/src/commons/services/base-db.service.ts b/src/commons/services/base-db.service.ts
new file mode 100644
index 0000000..ab52e02
--- /dev/null
+++ b/src/commons/services/base-db.service.ts
@@ -0,0 +1,179 @@
+import { AppBaseEntity } from '../entities/app-base-entity';
+import { Brackets, Repository, SelectQueryBuilder } from 'typeorm';
+import { TypeormHelper } from './typeorm-helper';
+import { UnprocessableEntityException } from '@nestjs/common';
+import {
+  DuplicateEntityException,
+  DuplicateFieldInfo,
+} from '../exceptions/duplicate-entity.exception';
+
+export class BaseDbService<Entity extends AppBaseEntity> extends TypeormHelper {
+  constructor(protected readonly repository: Repository<Entity>) {
+    super();
+  }
+
+  readonly uniqueFields: Array<keyof Entity | Array<keyof Entity>> = [];
+
+  async isDuplicateEntity<Dto extends Entity & Record<string, any>>(
+    dto: Partial<Dto>,
+    extendsFields: Array<keyof Dto> = [],
+  ): Promise<false | never> {
+    const qb = this.repository.createQueryBuilder('entity');
+    const compareFields = this.getCompareFields(dto, [
+      ...this.uniqueFields,
+      ...extendsFields,
+    ]);
+    if (compareFields.length > 0) {
+      qb.andWhere(
+        new Brackets((bqb) => {
+          for (const key of compareFields) {
+            if (Array.isArray(key)) {
+              bqb.orWhere(
+                new Brackets((bbqb) => {
+                  for (const k of key) {
+                    bbqb.andWhere(`entity.${k} = :${k}`);
+                  }
+                }),
+              );
+            } else {
+              bqb.orWhere(`entity.${key} = :${key}`);
+            }
+          }
+        }),
+      );
+    } else {
+      return false;
+    }
+    qb.setParameters(Object.assign({}, dto));
+    const uniqueFields = Array.from(new Set(compareFields.flat()));
+    qb.addSelect(uniqueFields.map((f) => `entity.${f} AS entity_${f}`));
+    return await this.checkDuplicateFields(qb, dto, uniqueFields);
+  }
+
+  async isDuplicateEntityForUpdate<Dto extends Entity>(
+    id: string,
+    dto: Partial<Dto>,
+    extendsFields: Array<keyof Dto & string> = [],
+  ): Promise<false | never> {
+    const qb = this.repository.createQueryBuilder('entity');
+    const compareFields = this.getCompareFields(dto, [
+      ...this.uniqueFields,
+      ...extendsFields,
+    ]);
+    const flatCompareFields = compareFields.flat();
+    if (compareFields.length > 0) {
+      qb.andWhere(
+        new Brackets((bqb) => {
+          for (const key of compareFields) {
+            if (Array.isArray(key)) {
+              if (key.length > 0) {
+                bqb.orWhere(
+                  new Brackets((bbqb) =>
+                    key.forEach((k) => {
+                      bbqb.andWhere(`entity.${k} = :${k}`);
+                    }),
+                  ),
+                );
+              }
+            } else {
+              bqb.orWhere(`entity.${key} = :${key}`);
+            }
+          }
+        }),
+      );
+    } else {
+      return false;
+    }
+    qb.andWhere(`entity.id <> :id`);
+    qb.setParameters(Object.assign({}, dto, { id }));
+    qb.addSelect(flatCompareFields.map((f) => `entity.${f} AS entity_${f}`));
+    return await this.checkDuplicateFields(qb, dto, compareFields);
+  }
+
+  async findOne(entity: Entity): Promise<Entity>;
+  async findOne(id: string): Promise<Entity>;
+  async findOne(idOrEntity: string | Entity): Promise<Entity> {
+    if (idOrEntity instanceof Object) {
+      return idOrEntity;
+    }
+    return await this.repository.findOneOrFail({
+      where: { id: idOrEntity },
+    });
+  }
+
+  checkProperty<T>(
+    obj: T,
+    field: keyof T,
+    whitelist: Array<typeof obj[keyof T]>,
+    errMsg: string,
+  ) {
+    if (!whitelist.some((item) => obj[field] === item)) {
+      throw new UnprocessableEntityException(errMsg);
+    }
+  }
+
+  async canYouRemoveWithIds(ids: string[]): Promise<void> {
+    return;
+  }
+
+  private getCompareFields<Dto>(
+    dto: Partial<Dto>,
+    fields: Array<keyof Dto | Array<keyof Dto>>,
+  ) {
+    if (!Array.isArray(fields)) {
+      return [];
+    }
+    const compareFields = [];
+    for (const field of fields as Array<keyof Dto | Array<keyof Dto>>) {
+      if (Array.isArray(field)) {
+        const tmpFields = [];
+        for (const f of field) {
+          if (dto[f] !== undefined) {
+            tmpFields.push(f);
+          }
+        }
+        compareFields.push(tmpFields);
+      } else if (dto[field] !== undefined) {
+        compareFields.push(field);
+      }
+    }
+    return compareFields;
+  }
+
+  private async checkDuplicateFields<Dto = { [p: string]: any }>(
+    qb: SelectQueryBuilder<Entity>,
+    dto: Dto,
+    compareFields: Array<keyof Dto & string>,
+  ): Promise<false | never> {
+    const existingEntity = await qb.getOne();
+    if (!existingEntity) {
+      return false;
+    }
+    const duplicateEntityInfo: DuplicateFieldInfo[] = [];
+    for (const key of compareFields) {
+      if (existingEntity[key as string] === dto[key]) {
+        duplicateEntityInfo.push({
+          property: key,
+          value: dto[key],
+        });
+      }
+    }
+    throw new DuplicateEntityException(duplicateEntityInfo);
+  }
+
+  protected async getTotalQueryBuilder(
+    qb: SelectQueryBuilder<Entity>,
+  ): Promise<SelectQueryBuilder<Entity>> {
+    const totalQb = qb.clone();
+    totalQb.offset(0).skip(0).take(undefined).limit(undefined);
+    return totalQb;
+  }
+
+  getUpdateRows(returned: any): number {
+    return returned?.affected;
+  }
+
+  isFindOne(queryArg): boolean {
+    return queryArg.id !== undefined;
+  }
+}
diff --git a/src/commons/services/password-converter.ts b/src/commons/services/password-converter.ts
new file mode 100644
index 0000000..c92047d
--- /dev/null
+++ b/src/commons/services/password-converter.ts
@@ -0,0 +1,15 @@
+import { Injectable } from '@nestjs/common';
+import { compare, genSalt, hash } from 'bcrypt';
+
+@Injectable()
+export class PasswordConverter {
+  async convertToStore(pwd: string | undefined): Promise<string> {
+    if (pwd === undefined) {
+      return undefined;
+    }
+    return await hash(pwd, await genSalt());
+  }
+  async compare(rawPwd: string, storePwd: string): Promise<boolean> {
+    return await compare(rawPwd, storePwd);
+  }
+}
diff --git a/src/commons/services/typeorm-helper.ts b/src/commons/services/typeorm-helper.ts
new file mode 100644
index 0000000..61a0d3b
--- /dev/null
+++ b/src/commons/services/typeorm-helper.ts
@@ -0,0 +1,304 @@
+import { SelectQueryBuilder } from 'typeorm';
+
+interface PaginationInterface {
+  pageSize?: number;
+  pageIndex?: number;
+  take?: number;
+  skip?: number;
+}
+
+export class TypeormHelper {
+  static pagination<T>(qb: SelectQueryBuilder<T>, params: PaginationInterface) {
+    if (!params.take || isNaN(params.take)) {
+      if (!params.pageSize || isNaN(params.pageSize)) {
+        params.pageSize = 50;
+      }
+      params.take = params.pageSize;
+    }
+    if (!params.skip || isNaN(params.skip)) {
+      if (!params.pageIndex || isNaN(params.pageIndex)) {
+        params.pageIndex = 1;
+      }
+      params.skip = (params.pageIndex - 1) * params.pageSize;
+    }
+    if (params.skip) {
+      qb.skip(params.skip);
+    }
+    if (params.take) {
+      qb.take(params.take);
+    }
+  }
+
+  static pagination4Raw<T>(
+    qb: SelectQueryBuilder<T>,
+    params: PaginationInterface,
+  ) {
+    if (!params.take || isNaN(params.take)) {
+      if (!params.pageSize || isNaN(params.pageSize)) {
+        params.pageSize = 15;
+      }
+      params.take = params.pageSize;
+    }
+    if (!params.skip || isNaN(params.skip)) {
+      if (!params.pageIndex || isNaN(params.pageIndex)) {
+        params.pageIndex = 1;
+      }
+      params.skip = (params.pageIndex - 1) * params.pageSize;
+    }
+    if (params.skip) {
+      qb.offset(params.skip);
+    }
+    if (params.take) {
+      qb.limit(params.take);
+    }
+  }
+
+  static filterActive<T>(
+    qb: SelectQueryBuilder<T>,
+    alias: string,
+    params: { isActive?: boolean },
+  ) {
+    if (params.isActive === true || params.isActive === false) {
+      qb.andWhere(`${alias}.isActive = :isActive`, params);
+    }
+  }
+
+  static filterDeletion<T>(
+    qb: SelectQueryBuilder<T>,
+    alias: string,
+    params: { isDelete?: boolean; includeDeleted?: boolean },
+  ) {
+    if (params.isDelete && params.includeDeleted) {
+      qb.andWhere(`${alias}.isDelete = true`);
+    } else if (params.isDelete === false || !params.includeDeleted) {
+      qb.andWhere(`${alias}.isDelete = false`);
+    }
+  }
+
+  static rangeFilter<T>(
+    qb: SelectQueryBuilder<T>,
+    alias: string,
+    fieldName: string,
+    params,
+  ) {
+    const beginAt = params[`${fieldName}GT`];
+    const endAt = params[`${fieldName}LT`];
+    if (beginAt) {
+      qb.andWhere(`${alias}.${fieldName} >= :${`${fieldName}GT`}`, {
+        [`${fieldName}GT`]: beginAt,
+      });
+    }
+    if (endAt) {
+      qb.andWhere(`${alias}.${fieldName} <= :${`${fieldName}LT`}`, {
+        [`${fieldName}LT`]: endAt,
+      });
+    }
+  }
+
+  static dateTimeRangeFilter2<T>(
+    qb: SelectQueryBuilder<T>,
+    alias: string,
+    fieldName: string,
+    beginAt: Date,
+    endAt: Date,
+  ) {
+    if (beginAt) {
+      qb.andWhere(`${alias}.${fieldName} >= :beginAt`, { beginAt });
+    }
+    if (endAt) {
+      qb.andWhere(`${alias}.${fieldName} <= :endAt`, { endAt });
+      qb.andWhere(`${alias}.${fieldName} >= :${fieldName}BeginAt`, {
+        [`${fieldName}BeginAt`]: beginAt,
+      });
+    }
+    if (endAt) {
+      qb.andWhere(`${alias}.${fieldName} <= :${fieldName}EndAt`, {
+        [`${fieldName}EndAt`]: endAt,
+      });
+    }
+  }
+
+  static baseQuery<T>(
+    qb: SelectQueryBuilder<T>,
+    alias: string,
+    params: {
+      isDelete?: boolean;
+      includeDeleted?: boolean;
+      isActive?: boolean;
+    } & PaginationInterface,
+  ) {
+    this.filterByIds(qb, alias, params);
+    this.pagination(qb, params);
+    this.filterActive(qb, alias, params);
+    this.filterDeletion(qb, alias, params);
+  }
+
+  static excludeDeletedRecords<T>(qb: SelectQueryBuilder<T>, alias: string) {
+    qb.andWhere(`${alias}.isDelete = FALSE`);
+  }
+
+  static filterBoolean<T>(
+    qb: SelectQueryBuilder<T>,
+    alias: string,
+    params: any,
+  ) {
+    for (const key of Object.keys(params)) {
+      if (params[key] === true || params[key] === false) {
+        const sql = `${alias}.${key} = :${key}`;
+        qb.andWhere(sql, { [key]: params[key] });
+      }
+    }
+  }
+
+  static filterBooleanWhenExists<T>(
+    qb: SelectQueryBuilder<T>,
+    alias: string,
+    field: string,
+    params: { [field: string]: any },
+  ) {
+    params[field] !== undefined &&
+      params[field] !== null &&
+      qb.andWhere(`${alias}.${field} = :${field}`, params);
+  }
+
+  static filterEqual<T>(
+    qb: SelectQueryBuilder<T>,
+    alias: string,
+    field: string,
+    params: { [field: string]: any },
+  ) {
+    params[field] !== undefined &&
+      qb.andWhere(`${alias}.${field} = :${field}`, params);
+  }
+
+  static sortResults<T>(
+    qb: SelectQueryBuilder<T>,
+    alias: string,
+    field: string,
+    params: { [field: string]: any },
+  ) {
+    params[`${field}OrderBy`] !== undefined &&
+      qb.addOrderBy(`${alias}.${field}`, params[`${field}OrderBy`]);
+  }
+
+  static filterLike<T, Conditions>(
+    qb: SelectQueryBuilder<T>,
+    alias: string,
+    field: string & (keyof Conditions | keyof T),
+    params: { [f: string]: any },
+  ) {
+    params[field] &&
+      qb.andWhere(`${alias}.${field} LIKE :like-$${field}`, {
+        [`like-${field}`]: `%${params[field]}%`,
+      });
+  }
+
+  static filterLike2<T>(
+    qb: SelectQueryBuilder<T>,
+    dbField: string,
+    pField: string,
+    params: { [field: string]: any },
+  ) {
+    params[pField] &&
+      qb.andWhere(`${dbField} LIKE :like-$${pField}`, {
+        [`like-${pField}`]: `%${params[pField]}%`,
+      });
+  }
+
+  static filterLike3<T>(
+    qb: SelectQueryBuilder<T>,
+    alias: string,
+    field: string,
+    params: { [field: string]: any },
+  ) {
+    params[field] &&
+      qb.andWhere(`${alias}.${field} LIKE :like-${field}`, {
+        [`like-${field}`]: `${params[field]}%`,
+      });
+  }
+
+  static filterNameOrRemark<T>(
+    qb: SelectQueryBuilder<T>,
+    alias: string,
+    params: { [field: string]: any },
+    nameField = 'name',
+    remarkField = 'remark',
+    pField = 'name',
+  ) {
+    params[pField] &&
+      qb.andWhere((qb1) =>
+        qb1
+          .orWhere(`${nameField} LIKE :${pField}`, {
+            [pField]: `%${params[pField]}%`,
+          })
+          .orWhere(`${remarkField} LIKE :${pField}`, {
+            [pField]: `%${params[pField]}%`,
+          })
+          .getQuery(),
+      );
+  }
+
+  static filterUserByIdOrName<T>(
+    qb: SelectQueryBuilder<T>,
+    alias: string,
+    entityName: string,
+    params: { [field: string]: any },
+  ) {
+    TypeormHelper.filterEqual(qb, alias, `${entityName}Id`, params);
+    TypeormHelper.filterLike2(
+      qb,
+      `${entityName}.nick`,
+      `${entityName}Name`,
+      params,
+    );
+  }
+
+  static filterUserByIdOrName2<T>(
+    qb: SelectQueryBuilder<T>,
+    alias: string,
+    entityName: string,
+    field = 'name',
+    params: { [field: string]: any },
+  ) {
+    TypeormHelper.filterEqual(qb, alias, `${entityName}Id`, params);
+    TypeormHelper.filterLike2(
+      qb,
+      `${entityName}.${field}`,
+      `${entityName}Name`,
+      params,
+    );
+  }
+
+  static filterByIds<T>(
+    qb: SelectQueryBuilder<T>,
+    alias: string,
+    params: { [field: string]: any },
+  ) {
+    let ids = Array.isArray(params.ids) ? params.ids : [params.id];
+    ids = ids.filter((id) => !!id);
+    if (ids.length > 0) {
+      qb.andWhereInIds(ids);
+    }
+  }
+
+  static filterIn<T>(
+    qb: SelectQueryBuilder<T>,
+    alias: string,
+    dbField: string,
+    pField: string,
+    params: { [field: string]: any },
+  ) {
+    if (!Array.isArray(params[pField])) {
+      return;
+    }
+    if (params[pField].length > 0) {
+      qb.andWhere(`${alias}.${dbField} IN (:...${pField})`, params);
+    } else {
+      qb.where('1 <> 1');
+    }
+  }
+
+  static getUserParentIds(user) {
+    return user.path.split('/').filter((v) => !!v);
+  }
+}
diff --git a/src/main.ts b/src/main.ts
index 0bdd83f..2cb827e 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -1,3 +1,4 @@
+import { ValidationPipe } from '@nestjs/common';
 import { ConfigService } from '@nestjs/config';
 import { NestFactory } from '@nestjs/core';
 import { AppModule } from './app.module';
@@ -5,6 +6,7 @@ import { AppModule } from './app.module';
 async function bootstrap() {
   const app = await NestFactory.create(AppModule);
   const configService = app.get(ConfigService);
+  app.useGlobalPipes(new ValidationPipe());
   await app.listen(configService.get<number>('http.port'));
 }
 bootstrap();
diff --git a/src/projects/dtos/create-project.input.ts b/src/projects/dtos/create-project.input.ts
new file mode 100644
index 0000000..7988e10
--- /dev/null
+++ b/src/projects/dtos/create-project.input.ts
@@ -0,0 +1,28 @@
+import { InputType } from '@nestjs/graphql';
+import { IsString, IsUrl, MaxLength, MinLength } from 'class-validator';
+
+@InputType({ isAbstract: true })
+export class CreateProjectInput {
+  @IsString()
+  @MaxLength(32)
+  @MinLength(2)
+  name: string;
+
+  @IsString()
+  @MaxLength(32)
+  @MinLength(2)
+  comment: string;
+
+  @IsUrl({ protocols: ['ssh'], require_protocol: false })
+  @MaxLength(256)
+  sshUrl: string;
+
+  @IsUrl()
+  @MaxLength(256)
+  webUrl?: string;
+
+  @IsString()
+  @MaxLength(128)
+  @MinLength(1)
+  webHookSecret?: string;
+}
diff --git a/src/projects/dtos/update-project.input.ts b/src/projects/dtos/update-project.input.ts
new file mode 100644
index 0000000..419d7c4
--- /dev/null
+++ b/src/projects/dtos/update-project.input.ts
@@ -0,0 +1,5 @@
+import { InputType } from '@nestjs/graphql';
+import { CreateProjectInput } from './create-project.input';
+
+@InputType()
+export class UpdateProjectInput extends CreateProjectInput {}
diff --git a/src/projects/project.entity.ts b/src/projects/project.entity.ts
new file mode 100644
index 0000000..07ec46d
--- /dev/null
+++ b/src/projects/project.entity.ts
@@ -0,0 +1,28 @@
+import { ObjectType } from '@nestjs/graphql';
+import { AppBaseEntity } from 'src/commons/entities/app-base-entity';
+import { Entity, Column, DeleteDateColumn } from 'typeorm';
+
+@ObjectType()
+@Entity()
+export class Project extends AppBaseEntity {
+  /**
+   * 唯一名称
+   */
+  @Column()
+  name: string;
+
+  @Column()
+  comment: string;
+
+  @Column()
+  sshUrl: string;
+
+  @Column({ nullable: true })
+  webUrl?: string;
+
+  @Column({ nullable: true })
+  webHookSecret?: string;
+
+  @DeleteDateColumn()
+  deletedAt?: Date;
+}
diff --git a/src/projects/projects.module.ts b/src/projects/projects.module.ts
new file mode 100644
index 0000000..daea7db
--- /dev/null
+++ b/src/projects/projects.module.ts
@@ -0,0 +1,11 @@
+import { Module } from '@nestjs/common';
+import { ProjectsService } from './projects.service';
+import { ProjectsResolver } from './projects.resolver';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { Project } from './project.entity';
+
+@Module({
+  imports: [TypeOrmModule.forFeature([Project])],
+  providers: [ProjectsService, ProjectsResolver],
+})
+export class ProjectsModule {}
diff --git a/src/projects/projects.resolver.spec.ts b/src/projects/projects.resolver.spec.ts
new file mode 100644
index 0000000..0a93e17
--- /dev/null
+++ b/src/projects/projects.resolver.spec.ts
@@ -0,0 +1,18 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { ProjectsResolver } from './projects.resolver';
+
+describe('ProjectsResolver', () => {
+  let resolver: ProjectsResolver;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [ProjectsResolver],
+    }).compile();
+
+    resolver = module.get<ProjectsResolver>(ProjectsResolver);
+  });
+
+  it('should be defined', () => {
+    expect(resolver).toBeDefined();
+  });
+});
diff --git a/src/projects/projects.resolver.ts b/src/projects/projects.resolver.ts
new file mode 100644
index 0000000..caf3ce0
--- /dev/null
+++ b/src/projects/projects.resolver.ts
@@ -0,0 +1,41 @@
+import { Args, Mutation, Query, Resolver } from '@nestjs/graphql';
+import { CreateProjectInput } from './dtos/create-project.input';
+import { UpdateProjectInput } from './dtos/update-project.input';
+import { Project } from './project.entity';
+import { ProjectsService } from './projects.service';
+
+@Resolver(() => Project)
+export class ProjectsResolver {
+  constructor(private readonly service: ProjectsService) {}
+  @Query(() => [Project])
+  async findProjects() {
+    return await this.service.list();
+  }
+
+  @Query(() => Project)
+  async findProject(@Args('id', { type: () => String }) id: string) {
+    return await this.service.findOne(id);
+  }
+
+  @Mutation(() => Project)
+  async createProject(
+    @Args('project', { type: () => CreateProjectInput })
+    dto: UpdateProjectInput,
+  ) {
+    return await this.service.create(dto);
+  }
+
+  @Mutation(() => Boolean)
+  async modifyProject(
+    @Args('id', { type: () => String }) id: string,
+    @Args('project', { type: () => UpdateProjectInput })
+    dto: UpdateProjectInput,
+  ) {
+    return await this.service.update(id, dto);
+  }
+
+  @Mutation(() => Number)
+  async deleteProject(@Args('id', { type: () => String }) id: string) {
+    return await this.service.remove(id);
+  }
+}
diff --git a/src/projects/projects.service.spec.ts b/src/projects/projects.service.spec.ts
new file mode 100644
index 0000000..d3b3101
--- /dev/null
+++ b/src/projects/projects.service.spec.ts
@@ -0,0 +1,18 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { ProjectsService } from './projects.service';
+
+describe('ProjectsService', () => {
+  let service: ProjectsService;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [ProjectsService],
+    }).compile();
+
+    service = module.get<ProjectsService>(ProjectsService);
+  });
+
+  it('should be defined', () => {
+    expect(service).toBeDefined();
+  });
+});
diff --git a/src/projects/projects.service.ts b/src/projects/projects.service.ts
new file mode 100644
index 0000000..54ccded
--- /dev/null
+++ b/src/projects/projects.service.ts
@@ -0,0 +1,35 @@
+import { Injectable } from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+import { BaseDbService } from 'src/commons/services/base-db.service';
+import { Repository } from 'typeorm';
+import { CreateProjectInput } from './dtos/create-project.input';
+import { Project } from './project.entity';
+
+@Injectable()
+export class ProjectsService extends BaseDbService<Project> {
+  readonly uniqueFields: Array<keyof Project> = ['name'];
+  constructor(
+    @InjectRepository(Project)
+    readonly repository: Repository<Project>,
+  ) {
+    super(repository);
+  }
+
+  async list() {
+    return this.repository.find();
+  }
+
+  async create(dto: CreateProjectInput) {
+    await this.isDuplicateEntity(dto);
+    return await this.repository.save(this.repository.create(dto));
+  }
+
+  async update(id: string, dto: CreateProjectInput) {
+    await this.isDuplicateEntityForUpdate(id, dto);
+    await this.repository.update({ id }, dto);
+  }
+
+  async remove(id: string) {
+    return (await this.repository.softDelete({ id })).affected;
+  }
+}