feat:增加common

@@ -2873,6 +2873,11 @@
       "resolved": "https://registry.npmjs.org/@types/ungap__global-this/-/ungap__global-this-0.3.1.tgz",
       "integrity": "sha512-+/DsiV4CxXl6ZWefwHZDXSe1Slitz21tom38qPCaG0DYCS1NnDPIQDTKcmQ/tvK/edJUKkmuIDBJbmKDiB0r/g=="
     },
+    "@types/validator": {
+      "version": "13.1.3",
+      "resolved": "https://registry.npmjs.org/@types/validator/-/validator-13.1.3.tgz",
+      "integrity": "sha512-DaOWN1zf7j+8nHhqXhIgNmS+ltAC53NXqGxYuBhWqWgqolRhddKzfZU814lkHQSTG0IUfQxU7Cg0gb8fFWo2mA=="
+    },
     "@types/webpack": {
       "version": "4.41.26",
       "resolved": "https://registry.npmjs.org/@types/webpack/-/webpack-4.41.26.tgz",
@@ -3642,6 +3647,155 @@
         "@apollo/protobufjs": "^1.0.3"
       }
     },
+    "apollo-server": {
+      "version": "2.21.0",
+      "resolved": "https://registry.npmjs.org/apollo-server/-/apollo-server-2.21.0.tgz",
+      "integrity": "sha512-OqngjOSB0MEH6VKGWHcrqt4y39HlhYh9CrMvn4PhadTt53IPYRmBglk5qSRA8xMorGqy60iKrOReqj5YfCjTOg==",
+      "requires": {
+        "apollo-server-core": "^2.21.0",
+        "apollo-server-express": "^2.21.0",
+        "express": "^4.0.0",
+        "graphql-subscriptions": "^1.0.0",
+        "graphql-tools": "^4.0.8",
+        "stoppable": "^1.1.0"
+      },
+      "dependencies": {
+        "@types/node-fetch": {
+          "version": "2.5.7",
+          "resolved": "https://registry.npmjs.org/@types/node-fetch/-/node-fetch-2.5.7.tgz",
+          "integrity": "sha512-o2WVNf5UhWRkxlf6eq+jMZDu7kjgpgJfl4xVNlvryc95O/6F2ld8ztKX+qu+Rjyet93WAWm5LjeX9H5FGkODvw==",
+          "requires": {
+            "@types/node": "*",
+            "form-data": "^3.0.0"
+          }
+        },
+        "apollo-env": {
+          "version": "0.6.6",
+          "resolved": "https://registry.npmjs.org/apollo-env/-/apollo-env-0.6.6.tgz",
+          "integrity": "sha512-hXI9PjJtzmD34XviBU+4sPMOxnifYrHVmxpjykqI/dUD2G3yTiuRaiQqwRwB2RCdwC1Ug/jBfoQ/NHDTnnjndQ==",
+          "requires": {
+            "@types/node-fetch": "2.5.7",
+            "core-js": "^3.0.1",
+            "node-fetch": "^2.2.0",
+            "sha.js": "^2.4.11"
+          }
+        },
+        "apollo-graphql": {
+          "version": "0.6.1",
+          "resolved": "https://registry.npmjs.org/apollo-graphql/-/apollo-graphql-0.6.1.tgz",
+          "integrity": "sha512-ZRXAV+k+hboCVS+FW86FW/QgnDR7gm/xMUwJPGXEbV53OLGuQQdIT0NCYK7AzzVkCfsbb7NJ3mmEclkZY9uuxQ==",
+          "requires": {
+            "apollo-env": "^0.6.6",
+            "lodash.sortby": "^4.7.0"
+          }
+        },
+        "apollo-server-core": {
+          "version": "2.21.0",
+          "resolved": "https://registry.npmjs.org/apollo-server-core/-/apollo-server-core-2.21.0.tgz",
+          "integrity": "sha512-GtIiq2F0dVDLzzIuO5+dK/pGq/sGxYlKCqAuQQqzYg0fvZ7fukyluXtcTe0tMI+FJZjU0j0WnKgiLsboCoAlPQ==",
+          "requires": {
+            "@apollographql/apollo-tools": "^0.4.3",
+            "@apollographql/graphql-playground-html": "1.6.26",
+            "@apollographql/graphql-upload-8-fork": "^8.1.3",
+            "@types/ws": "^7.0.0",
+            "apollo-cache-control": "^0.11.6",
+            "apollo-datasource": "^0.7.3",
+            "apollo-graphql": "^0.6.0",
+            "apollo-reporting-protobuf": "^0.6.2",
+            "apollo-server-caching": "^0.5.3",
+            "apollo-server-env": "^3.0.0",
+            "apollo-server-errors": "^2.4.2",
+            "apollo-server-plugin-base": "^0.10.4",
+            "apollo-server-types": "^0.6.3",
+            "apollo-tracing": "^0.12.2",
+            "async-retry": "^1.2.1",
+            "fast-json-stable-stringify": "^2.0.0",
+            "graphql-extensions": "^0.12.8",
+            "graphql-tag": "^2.11.0",
+            "graphql-tools": "^4.0.8",
+            "loglevel": "^1.6.7",
+            "lru-cache": "^6.0.0",
+            "sha.js": "^2.4.11",
+            "subscriptions-transport-ws": "^0.9.11",
+            "uuid": "^8.0.0",
+            "ws": "^6.0.0"
+          }
+        },
+        "apollo-server-env": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/apollo-server-env/-/apollo-server-env-3.0.0.tgz",
+          "integrity": "sha512-tPSN+VttnPsoQAl/SBVUpGbLA97MXG990XIwq6YUnJyAixrrsjW1xYG7RlaOqetxm80y5mBZKLrRDiiSsW/vog==",
+          "requires": {
+            "node-fetch": "^2.1.2",
+            "util.promisify": "^1.0.0"
+          }
+        },
+        "apollo-server-plugin-base": {
+          "version": "0.10.4",
+          "resolved": "https://registry.npmjs.org/apollo-server-plugin-base/-/apollo-server-plugin-base-0.10.4.tgz",
+          "integrity": "sha512-HRhbyHgHFTLP0ImubQObYhSgpmVH4Rk1BinnceZmwudIVLKrqayIVOELdyext/QnSmmzg5W7vF3NLGBcVGMqDg==",
+          "requires": {
+            "apollo-server-types": "^0.6.3"
+          }
+        },
+        "apollo-server-types": {
+          "version": "0.6.3",
+          "resolved": "https://registry.npmjs.org/apollo-server-types/-/apollo-server-types-0.6.3.tgz",
+          "integrity": "sha512-aVR7SlSGGY41E1f11YYz5bvwA89uGmkVUtzMiklDhZ7IgRJhysT5Dflt5IuwDxp+NdQkIhVCErUXakopocFLAg==",
+          "requires": {
+            "apollo-reporting-protobuf": "^0.6.2",
+            "apollo-server-caching": "^0.5.3",
+            "apollo-server-env": "^3.0.0"
+          }
+        },
+        "apollo-tracing": {
+          "version": "0.12.2",
+          "resolved": "https://registry.npmjs.org/apollo-tracing/-/apollo-tracing-0.12.2.tgz",
+          "integrity": "sha512-SYN4o0C0wR1fyS3+P0FthyvsQVHFopdmN3IU64IaspR/RZScPxZ3Ae8uu++fTvkQflAkglnFM0aX6DkZERBp6w==",
+          "requires": {
+            "apollo-server-env": "^3.0.0",
+            "apollo-server-plugin-base": "^0.10.4"
+          }
+        },
+        "form-data": {
+          "version": "3.0.1",
+          "resolved": "https://registry.npmjs.org/form-data/-/form-data-3.0.1.tgz",
+          "integrity": "sha512-RHkBKtLWUVwd7SqRIvCZMEvAMoGUp0XU+seQiZejj0COz3RI3hWP4sCv3gZWWLjJTd7rGwcsF5eKZGii0r/hbg==",
+          "requires": {
+            "asynckit": "^0.4.0",
+            "combined-stream": "^1.0.8",
+            "mime-types": "^2.1.12"
+          }
+        },
+        "graphql-tools": {
+          "version": "4.0.8",
+          "resolved": "https://registry.npmjs.org/graphql-tools/-/graphql-tools-4.0.8.tgz",
+          "integrity": "sha512-MW+ioleBrwhRjalKjYaLQbr+920pHBgy9vM/n47sswtns8+96sRn5M/G+J1eu7IMeKWiN/9p6tmwCHU7552VJg==",
+          "requires": {
+            "apollo-link": "^1.2.14",
+            "apollo-utilities": "^1.0.1",
+            "deprecated-decorator": "^0.1.6",
+            "iterall": "^1.1.3",
+            "uuid": "^3.1.0"
+          },
+          "dependencies": {
+            "uuid": {
+              "version": "3.4.0",
+              "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.4.0.tgz",
+              "integrity": "sha512-HjSDRw6gZE5JMggctHBcjVak08+KEVhSIiDzFnT9S9aegmp85S/bReBVTb4QTFaRNptJ9kuYaNhnbNEOkbKb/A=="
+            }
+          }
+        },
+        "ws": {
+          "version": "6.2.1",
+          "resolved": "https://registry.npmjs.org/ws/-/ws-6.2.1.tgz",
+          "integrity": "sha512-GIyAXC2cB7LjvpgMt9EKS2ldqr0MTrORaleiOno6TweZ6r3TKtoFQWay/2PceJ3RuBasOHzXNn5Lrw1X0bEjqA==",
+          "requires": {
+            "async-limiter": "~1.0.0"
+          }
+        }
+      }
+    },
     "apollo-server-caching": {
       "version": "0.5.3",
       "resolved": "https://registry.npmjs.org/apollo-server-caching/-/apollo-server-caching-0.5.3.tgz",
@@ -4804,6 +4958,11 @@
       "integrity": "sha512-uc2Vix1frTfnuzxxu1Hp4ktSvM3QaI4oXl4ZUqL1wjTu/BGki9TrCWoqLTg/drR1KwAEarXuRFCG2Svr1GxPFw==",
       "dev": true
     },
+    "class-transformer": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/class-transformer/-/class-transformer-0.4.0.tgz",
+      "integrity": "sha512-ETWD/H2TbWbKEi7m9N4Km5+cw1hNcqJSxlSYhsLsNjQzWWiZIYA1zafxpK9PwVfaZ6AqR5rrjPVUBGESm5tQUA=="
+    },
     "class-utils": {
       "version": "0.3.6",
       "resolved": "https://registry.npmjs.org/class-utils/-/class-utils-0.3.6.tgz",
@@ -4827,6 +4986,16 @@
         }
       }
     },
+    "class-validator": {
+      "version": "0.13.1",
+      "resolved": "https://registry.npmjs.org/class-validator/-/class-validator-0.13.1.tgz",
+      "integrity": "sha512-zWIeYFhUitvAHBwNhDdCRK09hWx+P0HUwFE8US8/CxFpMVzkUK8RJl7yOIE+BVu2lxyPNgeOaFv78tLE47jBIg==",
+      "requires": {
+        "@types/validator": "^13.1.3",
+        "libphonenumber-js": "^1.9.7",
+        "validator": "^13.5.2"
+      }
+    },
     "clean-stack": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/clean-stack/-/clean-stack-2.2.0.tgz",
@@ -8016,6 +8185,11 @@
         "type-check": "~0.4.0"
       }
     },
+    "libphonenumber-js": {
+      "version": "1.9.11",
+      "resolved": "https://registry.npmjs.org/libphonenumber-js/-/libphonenumber-js-1.9.11.tgz",
+      "integrity": "sha512-ussVs6j3k0NEU4PNwWmVNGgmZQ88YrqzAw80ztmBfEhIQr55FpjFzPoDk5sWIfOmPuY1jmCKrxWCIemkBKqSPw=="
+    },
     "lines-and-columns": {
       "version": "1.1.6",
       "resolved": "https://registry.npmjs.org/lines-and-columns/-/lines-and-columns-1.1.6.tgz",
@@ -10339,6 +10513,11 @@
       "integrity": "sha1-NbCYdbT/SfJqd35QmzCQoyJr8ks=",
       "dev": true
     },
+    "stoppable": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/stoppable/-/stoppable-1.1.0.tgz",
+      "integrity": "sha512-KXDYZ9dszj6bzvnEMRYvxgeTHU74QBFL54XKtP3nyMuJ81CFYtABZ3bAzL2EdFUaEwJOBOgENyFj3R7oTzDyyw=="
+    },
     "streamsearch": {
       "version": "0.1.2",
       "resolved": "https://registry.npmjs.org/streamsearch/-/streamsearch-0.1.2.tgz",
@@ -11283,6 +11462,11 @@
         "spdx-expression-parse": "^3.0.0"
       }
     },
+    "validator": {
+      "version": "13.5.2",
+      "resolved": "https://registry.npmjs.org/validator/-/validator-13.5.2.tgz",
+      "integrity": "sha512-mD45p0rvHVBlY2Zuy3F3ESIe1h5X58GPfAtslBjY7EtTqGquZTj+VX/J4RnHWN8FKq0C9WRVt1oWAcytWRuYLQ=="
+    },
     "vary": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",

@@ -26,7 +26,10 @@
     "@nestjs/core": "^7.5.1",
     "@nestjs/graphql": "^7.9.9",
     "@nestjs/platform-express": "^7.5.1",
+    "apollo-server": "^2.21.0",
     "apollo-server-express": "^2.21.0",
+    "class-transformer": "^0.4.0",
+    "class-validator": "^0.13.1",
     "graphql": "^15.5.0",
     "graphql-tools": "^7.0.4",
     "nestjs-config": "^1.4.7",

+import { Module } from '@nestjs/common';
+import { AuthorsService } from './authors.service';
+import { AuthorsResolver } from './authors.resolver';
+@Module({
+  providers: [AuthorsService, AuthorsResolver],
+})
+export class AuthorsModule {}

@@ -9,15 +9,25 @@ import {
   Int,
 } from '@nestjs/graphql';
 import { PubSub } from 'graphql-subscriptions';
-import { Author } from './models/aothor.model';
+import { Author } from './models/author.model';
 import { Post } from './models/post.model';
-import { AuthorService } from './author.service';
+import { AuthorsService } from './authors.service';
+import { PostsService } from './posts.service';
 
 const pubSub = new PubSub();
 
 @Resolver(() => Author)
-export class AuthorResolver {
-  constructor(private authorsService: AuthorService) {}
+export class AuthorsResolver {
+  constructor(
+    private authorsService: AuthorsService,
+    private postsService: PostsService,
+  ) {}
+
+  @Query((returns) => Author)
+  async author(@Args('id', { type: () => Int }) id: number) {
+    return this.authorsService.findOneById(id);
+  }
+
   // 根据id查询作者信息
   @Query((returns) => Author, {
     name: 'author',

 import { Injectable } from '@nestjs/common';
 @Injectable()
-export class AuthorService {
+export class AuthorsService {
   async findOneById() {}
-}
\ No newline at end of file
+}

+import { ArgsType, Field, Int } from '@nestjs/graphql';
+import { MinLength } from 'class-validator';
+
+@ArgsType()
+class GetAuthorArgs {
+  @Field({ nullable: true })
+  firstName?: string;
+
+  @Field({ defaultValue: '' })
+  @MinLength(3)
+  lastName: string;
+}

+import { SchemaDirectiveVisitor } from 'apollo-server';
+import { defaultFieldResolver, GraphQLField } from 'graphql';
+
+export class UpperCaseDirective extends SchemaDirectiveVisitor {
+  visitFieldDefinition(field: GraphQLField<any, any>) {
+    const { resolve = defaultFieldResolver } = field;
+    field.resolve = async function (...args) {
+      const result = await resolve.apply(this, args);
+      if (typeof result === 'string') {
+        return result.toUpperCase();
+      }
+      return result;
+    };
+  }
+}

+import { Plugin } from '@nestjs/graphql';
+import {
+  ApolloServerPlugin,
+  GraphQLRequestListener,
+} from 'apollo-server-plugin-base';
+
+@Plugin()
+export class LoggingPlugin implements ApolloServerPlugin {
+  requestDidStart(): GraphQLRequestListener {
+    console.log('Request started');
+    return {
+      willSendResponse() {
+        console.log('Will send response');
+      },
+    };
+  }
+}

+import { CustomScalar, Scalar } from '@nestjs/graphql';
+import { Kind } from 'graphql';
+
+@Scalar('Date')
+export class DateScalar implements CustomScalar<number, Date> {
+  description = 'Date custom scalar type';
+
+  parseValue(value: number): Date {
+    return new Date(value); // value from the client
+  }
+
+  serialize(value: Date): number {
+    return value.getTime(); // value sent to the client
+  }
+
+  parseLiteral(ast: any): Date {
+    if (ast.kind === Kind.INT) {
+      return new Date(ast.value);
+    }
+    return null;
+  }
+}

-import { Module } from '@nestjs/common';
-import { AuthorService } from './author.service';
-import { AuthorResolver } from './author.resolver';
-@Module({
-  providers: [AuthorService, AuthorResolver],
-})
-export class AuthorModule {}

-export class GetAuthorArgs {}

 import { Test, TestingModule } from '@nestjs/testing';
 import { INestApplication } from '@nestjs/common';
 import * as request from 'supertest';
-import { AppModule } from './../src/app.module';
+import { ApplicationModule } from './../src/app.module';
 
 describe('AppController (e2e)', () => {
   let app: INestApplication;
 
   beforeEach(async () => {
     const moduleFixture: TestingModule = await Test.createTestingModule({
-      imports: [AppModule],
+      imports: [ApplicationModule],
     }).compile();
 
     app = moduleFixture.createNestApplication();