Mongoid :: Errors :: DocumentNotFound raise_not_found_error

Question

*在底部更新*

在寻找不存在的用户时,我得到:

UsersController#show中的Mongoid :: Errors :: DocumentNotFound

问题:找不到具有id(s)22的类User的文档.摘要:当使用id或id数组调用User.find时,每个参数必须与数据库中的文档匹配,否则将引发此错误.搜索的是id(s):22 ...(总共1个)并且找不到以下ID:22.解决方案:搜索数据库中的id或将Mongoid.raise_not_found_error配置选项设置为false,这将导致返回nil而不是在搜索单个id时引发此错误,或者在搜索倍数时仅返回匹配的文档.

但是我将raise_not_found_error设置为false

mongoid.yml

development:
  adapter: 'mongoid'
  # Configure available database sessions. (required)
  sessions:
    # Defines the default session. (required)
    default:
      # Defines the name of the default database that Mongoid can connect to.
      # (required).
      database: blog_development
      # Provides the hosts the default session can connect to. Must be an array
      # of host:port pairs. (required)
      hosts:
        - localhost:27017
      options:
          allow_dynamic_fields: false
          identity_map_enabled: true
          include_root_in_json: true
          include_type_for_serialization: true
          # Note this can also be true if you want to preload everything, but this is
          # almost never necessary. Most of the time set this to false.
          preload_models:
            - Canvas
            - Browser
            - Firefox
          scope_overwrite_exception: true
          raise_not_found_error: false
          skip_version_check: false
          use_activesupport_time_zone: false
          use_utc: true
  # Configure Mongoid specific options. (optional)
  options:
    # Enable the identity map, needed for eager loading. (default: false)
    # identity_map_enabled: false

    # Includes the root model name in json serialization. (default: false)
    # include_root_in_json: false

    # Include the _type field in serializaion. (default: false)
    # include_type_for_serialization: false

    # Preload all models in development, needed when models use
    # inheritance. (default: false)
    # preload_models: false

    # Protect id and type from mass assignment. (default: true)
    # protect_sensitive_fields: true

    # Raise an error when performing a #find and the document is not found.
    # (default: true)
    raise_not_found_error: false

    # Raise an error when defining a scope with the same name as an
    # existing method. (default: false)
    scope_overwrite_exception: false

    # Skip the database version check, used when connecting to a db without
    # admin access. (default: false)
    # skip_version_check: false

    # Use Active Support's time zone in conversions. (default: true)
    # use_activesupport_time_zone: true

    # Ensure all times are UTC in the app side. (default: false)
    # use_utc: false
test:
  sessions:
    default:
      database: blog_test
      hosts:
        - localhost:27017
      options:
        consistency: :strong
        # In the test environment we lower the retries and retry interval to
        # low amounts for fast failures.
        max_retries: 1
        retry_interval: 0

调节器

  # GET /users/1
  # GET /users/1.json
  def show

    @user = User.find(params[:id])

    render json: @user
  end

*UPDATE** 通过这样做修复了一个空响应(不是json格式):

  def show

    @user = User.find(params[:id])
    if @user.nil?
      @user = []
    end

    render json: @user
  end

Answer 1

你的yml结构是错误的

必须 -

development:
  sessions:
    options:
      #raise_not_found_error has to be not here but see below
  options: #strictly 2 spaces before
    raise_not_found_error: false #strictly 4 spaces before not 6

所以,raise_not_found_error参数必须是孩子development>options,而不是development>sessions>options

Answer 2

对我来说,即使正确的缩进也不起作用,在config/initializers /中创建一个名为mongoid.rb的初始化文件,并将其放入其中

Mongoid.raise_not_found_error = false