Question

如果我有chapters_controller实体和Book实体，我的Chapter的强参数应该是什么？

注意：我使用的是JSON API。

在我的chapters_controller中，我的强参数应该是：

:title, :order, :content, :published, :book, :picture

或者它应该是：

:title, :order, :content, :published, :book_id, :picture

如果我使用:book而不是:book_id，那么在我的Ember应用程序中，当我创建新章节时，我能够创建它并将本章与父书相关联，，我的测试失败了：

def setup
  @book = books(:one)

  @new_chapter = {
    title: "Cooked Wolf Dinner",
    order: 4,
    published: false,
    content: "The bad wolf was very mad. He was determined to eat the little pig so he climbed down the chimney.",
    book: @book
  }
end

def format_jsonapi(params)
  params = {
    data: {
      type: "books",
      attributes: params
    }
  }
  return params
end

...

test "chapter create - should create new chapter assigned to an existing book" do
  assert_difference "Chapter.count", +1 do
    post chapters_path, params: format_jsonapi(@new_chapter), headers: user_authenticated_header(@jim)
    assert_response :created

    json = JSON.parse(response.body)

    attributes = json['data']['attributes']

    assert_equal "Cooked Wolf Dinner", attributes['title']
    assert_equal 4, attributes['order']
    assert_equal false, attributes['published']
    assert_equal @book.title, attributes['book']['title']
  end
end

我在控制台中收到错误，指出关联类型不匹配。

也许是我的专栏：

book: @book

引起了什么？

无论哪种方式，直觉都告诉我，我应该在:book强参数中使用chapters_controller。

这只是我的测试没有通过，我不知道如何为我的测试写入参数hash来传递。

Answer 1

经过几个小时的努力并查看JSON API文档：

http://jsonapi.org/format/#crud-creating

我注意到，为了将belongsTo关系设置为具有JSON API的实体，我们需要这样做：

POST /photos HTTP/1.1
Content-Type: application/vnd.api+json
Accept: application/vnd.api+json

{
  "data": {
    "type": "photos",
    "attributes": {
      "title": "Ember Hamster",
      "src": "http://example.com/images/productivity.png"
    },
    "relationships": {
      "photographer": {
        "data": { "type": "people", "id": "9" }
      }
    }
  }
}

这也让我解决了我过去遇到的另一个问题，我无法解决这个问题。可以使用多种类型创建书籍。

用于将Genre数组分配给Book实体的JSON API结构，我们将数据哈希替换为关系部分中的数据数组，如下所示：

"data": [
    { "type": "comments", "id": "5" },
    { "type": "comments", "id": "12" }
]

另外，在我的控制器中，任何强大的参数都是这样的：

:title, :content, genre_ids: []

变为

:title, :content, :genres

遵守JSON API。

因此，对于我现在的新测试样本数据：

def setup
  ...
  @new_chapter = {
    title: "Cooked Wolf Dinner",
    order: 4,
    published: false,
    content: "The bad wolf was very mad. He was determined to eat the little pig so he climbed down the chimney.",
  }
  ...
end

def format_jsonapi(params, book_id = nil)
  params = {
    data: {
      type: "chapters",
      attributes: params
    }
  }

  if book_id != nil
    params[:data][:relationships] = {
      book: {
        data: {
          type: "books",
          id: book_id
        }
      }
    }
  end

  return params
end

关于关系设置的特别说明 - 如果存在关系，则仅将relationships添加到params，否则，将其设置为nil会告诉JSON API删除该关系，而不是忽略它。< / p>

然后我可以像这样调用我的测试：

test "chapter create - should create new chapter assigned to an existing book" do
  assert_difference "Chapter.count", +1 do
  post chapters_path, params: format_jsonapi(@new_chapter, @book.id), headers: user_authenticated_header(@jim)
  assert_response :created

  json = JSON.parse(response.body)

  attributes = json['data']['attributes']

  assert_equal "Cooked Wolf Dinner", attributes['title']
  assert_equal 4, attributes['order']
  assert_equal false, attributes['published']
  assert_equal @book.id, json['data']['relationships']['book']['data']['id'].to_i
end

Rails Ember强大的参数说明

1 个答案: