您尝试从mongoose模型生成名为"Projects“的GraphQL类型，但此类型已存在于SchemaComposer中

npm install graphql-compose graphql-compose-mongoose

const { composeWithMongoose } = require('graphql-compose-mongoose');
const { schemaComposer } = require('graphql-compose');

const ProjectModel = require('./path/to/projectModel'); // 导入mongoose模型

const customizationOptions = {}; // 可选参数，用于自定义类型

const ProjectTC = composeWithMongoose(ProjectModel, customizationOptions); // 使用composeWithMongoose生成GraphQL类型

schemaComposer.Query.addFields({
  projectById: ProjectTC.getResolver('findById'),
  projectByIds: ProjectTC.getResolver('findByIds'),
  projectOne: ProjectTC.getResolver('findOne'),
  projectMany: ProjectTC.getResolver('findMany'),
  projectCount: ProjectTC.getResolver('count'),
});

schemaComposer.Mutation.addFields({
  projectCreate: ProjectTC.getResolver('createOne'),
  projectUpdateById: ProjectTC.getResolver('updateById'),
  projectRemoveById: ProjectTC.getResolver('removeById'),
});

const graphqlSchema = schemaComposer.buildSchema();

if (!schemaComposer.has('Projects')) {
  const ProjectTC = composeWithMongoose(ProjectModel, customizationOptions);
  schemaComposer.Query.addFields({
    // ...
  });
  schemaComposer.Mutation.addFields({
    // ...
  });
}