graphql-compose - 您尝试从 Mongoose 模型生成名称为 "Projects"的 GraphQL 类型，但该类型已存在于 SchemaComposer 中

Question

我使用不同的 mongodb 数据库来存储相同的 Mongoose 模式记录“页面”。因此，我希望拥有 X 个 graphql 端点 - 每个端点都应为请求的数据库的“页面”提供服务。
示例:localhost:3000/graphql/:database出于这个原因，我创建了一个 schemaComposer，它从路由中获取数据库名称(express > request.param.database)

import { composeMongoose } from 'graphql-compose-mongoose'
import { SchemaComposer } from 'graphql-compose'
import { Pages } from '../../mongoose/models/PagesModel.js'
import { Projects } from '../../mongoose/models/ProjectsModel.js'

const gqlSchemaComposerBuilder = (database) => {
    const gqlSchemaComposer = new SchemaComposer()

    const ProjectsTC = composeMongoose(Projects, {})
    const PagesTC = composeMongoose(Pages(database), {})

    gqlSchemaComposer.Query.addFields({
        pageMany: PagesTC.mongooseResolvers.findMany(),
        pageOne: PagesTC.mongooseResolvers.findOne(),

        projectMany: ProjectsTC.mongooseResolvers.findMany(),
        projectOne: ProjectsTC.mongooseResolvers.findOne()
    })

    gqlSchemaComposer.Mutation.addFields({
        projectCreateOne: ProjectsTC.mongooseResolvers.createOne(),
        projectUpdateOne: ProjectsTC.mongooseResolvers.updateOne(),
        projectRemoveOne: ProjectsTC.mongooseResolvers.removeOne()
    })

    return gqlSchemaComposer.buildSchema()
}

export default gqlSchemaComposerBuilder

问题是，只要 composeMongoose声明被包裹在函数中我得到这个错误:

{"errors":[{"message":"You try to generate GraphQL Type with name Projects from mongoose model but this type already exists in SchemaComposer. Please choose another type name \"composeWithMongoose(model, { name: 'NewTypeName' })\", or reuse existed type \"schemaComposer.getOTC('TypeName')\", or remove type from SchemaComposer before calling composeWithMongoose method \"schemaComposer.delete('TypeName')\"."}]}

Answer 1

默认 composeMongoose()使用全局schemaComposer ，所以你需要通过你的 gqlSchemaComposer在 componseMongo 的选项中

const gqlSchemaComposer = new SchemaComposer()

const ProjectsTC = composeMongoose(Projects, { schemaComposer: gqlSchemaComposer })
const PagesTC = composeMongoose(Pages(database), {schemaComposer: gqlSchemaComposer})