Add a dedicated GQL server for metadata available on /meta (#1820)

server/src/metadata/metadata.module.ts

@@ -0,0 +1,53 @@
+import { Module } from '@nestjs/common';
+import { TypeOrmModule, TypeOrmModuleOptions } from '@nestjs/typeorm';
+import { GraphQLModule } from '@nestjs/graphql';
+
+import { YogaDriverConfig, YogaDriver } from '@graphql-yoga/nestjs';
+import GraphQLJSON from 'graphql-type-json';
+
+import { MetadataService } from './metadata.service';
+import { MetadataController } from './metadata.controller';
+import { typeORMMetadataModuleOptions } from './metadata.datasource';
+import { MetadataResolver } from './metadata.resolver';
+
+import { DataSourceModule } from './data-source/data-source.module';
+import { DataSourceMetadataModule } from './data-source-metadata/data-source-metadata.module';
+import { FieldMetadataModule } from './field-metadata/field-metadata.module';
+import { ObjectMetadataModule } from './object-metadata/object-metadata.module';
+import { EntitySchemaGeneratorModule } from './entity-schema-generator/entity-schema-generator.module';
+import { MigrationGeneratorModule } from './migration-generator/migration-generator.module';
+import { TenantMigrationModule } from './tenant-migration/tenant-migration.module';
+
+const typeORMFactory = async (): Promise<TypeOrmModuleOptions> => ({
+  ...typeORMMetadataModuleOptions,
+  name: 'metadata',
+});
+
+@Module({
+  imports: [
+    TypeOrmModule.forRootAsync({
+      useFactory: typeORMFactory,
+      name: 'metadata',
+    }),
+    GraphQLModule.forRoot<YogaDriverConfig>({
+      context: ({ req }) => ({ req }),
+      driver: YogaDriver,
+      autoSchemaFile: true,
+      include: [MetadataModule],
+      resolvers: { JSON: GraphQLJSON },
+      plugins: [],
+      path: '/metadata',
+    }),
+    DataSourceModule,
+    DataSourceMetadataModule,
+    FieldMetadataModule,
+    ObjectMetadataModule,
+    EntitySchemaGeneratorModule,
+    MigrationGeneratorModule,
+    TenantMigrationModule,
+  ],
+  providers: [MetadataService, MetadataResolver],
+  exports: [MetadataService],
+  controllers: [MetadataController],
+})
+export class MetadataModule {}