新的Rails GraphQL安装无法加载/graphiql；崩溃时会出现“无效或不完整的内省结果。请确保您正在传递.”

Question

复制步骤：rails new HelloGraphQLWorld

安装Gems

gem 'graphiql-rails', group: :development
gem 'graphql'

运行bundle install

然后运行graphql安装程序：rails generate graphql:install

注意，这里由安装程序·Start rails服务器在浏览器窗口中为您生成了几个文件：rails s·here /graphiql。

它崩溃(无法正确打开)：

{
  "message": "Invalid or incomplete introspection result. Ensure that you are passing \"data\" property of introspection response and no \"errors\" was returned alongside: {}.",
  "stack": "Error: Invalid or incomplete introspection result. Ensure that you are passing \"data\" property of introspection response and no \"errors\" was returned alongside: {}.\n    at devAssert (webpack-internal:///../../../node_modules/graphql/jsutils/devAssert.mjs:7:11)\n    at buildClientSchema (webpack-internal:///../../../node_modules/graphql/utilities/buildClientSchema.mjs:41:266)\n    at eval (webpack-internal:///./components/GraphiQL.tsx:1133:57)"
}

​

​

Answer 1

如果应用程序名不正确，TitleCase就会发生这种情况。

具有讽刺意味的是，应用程序名称中的"QL“是问题所在，因为生成器使用HelloGraphQLWorldSchema对代码进行了分类，但是Zietwork (Rails的一部分)期望将其正确命名为HelloGraphQlWorldSchema

文件定义app/graphql/hello_graph_ql_world_schema.rb和graphQL控制器也都是

// graphql_controller.rb

    result = HelloGraphQLWorldSchema.execute(query, variables: variables, context: context, operation_name: operation_name)

应该是

    result = HelloGraphQlWorldSchema.execute(query, variables: variables, context: context, operation_name: operation_name)

{
  "errors": [
    {
      "message": "uninitialized constant GraphqlController::HelloGraphQLWorldSchema\nDid you mean?  HelloGraphQlWorldSchema",
      "backtrace": [
        "/Users/jason/Work/_LEARNING/GraphQL/HelloGraphQLWorld/app/controllers/graphql_controller.rb:15:in `execute'",
        "/Users/jason/.rvm/gems/ruby-2.7.5/gems/actionpack-7.0.0/lib/action_controller/metal/basic_implicit_render.rb:6:in `send_action'",
        "/Users/jason/.rvm/gems/ruby-2.7.5/gems/actionpack-7.0.0/lib/abstract_controller/base.rb:214:in `process_action'",
        "/Users/jason/.rvm/gems/ruby-2.7.5/gems/actionpack-7.0.0/lib/action_controller/metal/rendering.rb:53:in `process_action'",
        "/Users/jason/.rvm/gems/ruby-2.7.5/gems/actionpack-7.0.0/lib/abstract_controller/callbacks.rb:234:in `block in process_action'",
        "/Users/jason/.rvm/gems/ruby-2.7.5/gems/activesupport-

​

​

或者，如果你的应用程序有正确的标题，这不应该适用于你。