blocks|key|2932037|text|您可以自由地在您的强参数方法中执行一些魔术。根据您的需求，您的控制器中可能包含以下方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2932038|def+vintage_params
++params.require(:vintage).permit(:year,+:name,+:foo,+{+sizes:+[:name,+:quantity]+})
end|code-block|syntax|javascript|2932039|您所需要做的就是在该方法中调整sizes键的名称。我会推荐：|offset|length|style|CODE|2932040|def+vintage_params
++vintage_params+=+params.require(:vintage).permit(:year,+:name,+:foo,+{+sizes:+[:name,+:quantity]+})
++vintage_params[:sizes_attributes]+=+vintage_params.delete+:sizes
++vintage_params.permit!
end|2932041|这将删除:sizes密钥并将其放入预期的:sizes_attributes中，而不会弄乱您漂亮的json。您不能直接使用accepts_nested_attributes_for来更改名称。|2932042|entityMap^0|0|0|F|5|0|0|4|6|K|H|1O|T|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@$I|V|J|W|K|L]]|9|@]|A|$]]|$1|M|3|N|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|Y|8|@$I|Z|J|10|K|L]|$I|11|J|12|K|L]|$I|13|J|14|K|L]]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|15|8|@]|9|@]|A|$]]]|R|$]]

You are free to perform some magic in your strong parameters methods. Based on what you want, you likely have this method in your controller:

<pre><code>def vintage_params
 params.require(:vintage).permit(:year, :name, :foo, { sizes: [:name, :quantity] })
end
</code></pre>

All you'd need to do is adjust the name of the <code>sizes</code> key in that method. I'd recommend:

<pre><code>def vintage_params
 vintage_params = params.require(:vintage).permit(:year, :name, :foo, { sizes: [:name, :quantity] })
 vintage_params[:sizes_attributes] = vintage_params.delete :sizes
 vintage_params.permit!
end
</code></pre>

This will remove the <code>:sizes</code> key and put it in the expected <code>:sizes_attributes</code> without messing up your pretty json. There is nothing you can do directly with <code>accepts_nested_attributes_for</code> to change the name.

blocks|key|142329|text|我也在寻找一种方法来避免使用嵌套属性cruft来污染我的RESTful应用程序接口。我想我应该分享我的解决方案，因为它足够通用，对遇到同样问题的任何人都很有用。它从一个简单的模块开始，该模块可以从您的控制器中利用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|142330|module+PrettyApi
++class+<<+self
++++def+with_nested_attributes(params,+attrs)
++++++return+if+params.blank?

++++++case+attrs
++++++when+Hash
++++++++with_nested_hash_attributes(params,+attrs)
++++++when+Array
++++++++with_nested_array_attributes(params,+attrs)
++++++when+String,+Symbol
++++++++unless+params[attrs].blank?
++++++++++params["#{attrs}_attributes"]+=+params.delete+attrs
++++++++end
++++++end
++++++params
++++end

++++private

++++def+with_nested_hash_attributes(params,+attrs)
++++++attrs.each+do+%7Ck,+v%7C
++++++++with_nested_attributes+params[k],+v
++++++++with_nested_attributes+params,+k
++++++end
++++end

++++def+with_nested_array_attributes(params,+attrs)
++++++params.each+do+%7Cnp%7C
++++++++attrs.each+do+%7Cv%7C
++++++++++with_nested_attributes+np,+v
++++++++end
++++++end
++++end
++end
end|code-block|syntax|javascript|142331|下面是一个在控制器中使用此模块的示例，用于从移动客户端上传地址簿：|142332|class+V1::AddressBooksController+<+V1::BaseController
++def+create
++++@address_book+=+AddressBook.new+address_book_params
++++unless+@address_book.save
++++++errors+=+@address_book.errors.to_hash(true)
++++++render+status:+422,+json:+{+errors:+errors+}
++++end
++end

++private

++def+address_book_params
++++PrettyApi.with_nested_attributes++pretty_address_book_params,
++++++++++++++++++++++++++++++++++++++contacts:+[:emails,+:phones,+:addresses]
++end

++def+pretty_address_book_params
++++params.permit(
++++++:device_install_id,
++++++contacts:+[
++++++++:local_id,
++++++++:first_name,
++++++++:last_name,
++++++++:nickname,
++++++++emails:+[
++++++++++:value,
++++++++++:type
++++++++],
++++++++phones:+[
++++++++++:value,
++++++++++:type
++++++++],
++++++++addresses:+[
++++++++++:type,
++++++++++:street_address,
++++++++++:city,
++++++++++:state,
++++++++++:postal_code,
++++++++++:country
++++++++]
++++++]
++++)
++end
end|142333|请注意，声明嵌套属性的语法反映了在控制器中声明允许的参数的语法。|142334|Here's+the+Gist+for+this+example.|offset|length|142335|我希望有人会发现这对我有帮助！|142336|entityMap|0|LINK|mutability|MUTABLE|url|https://gist.github.com/tlowrimore/5ce1ad28d6599072506e^0|0|0|0|0|0|0|X|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|12|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|14|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|15|8|@]|9|@$O|16|P|17|1|18]]|A|$]]|$1|Q|3|R|5|6|7|19|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|1A|8|@]|9|@]|A|$]]]|T|$U|$5|V|W|X|A|$Y|Z]]]]

I too was looking for a way to avoid polluting my RESTful API with the nested attributes cruft. I thought I'd share my solution, as it's general enough to be useful for anyone running into the same issue. It begins with a simple module to be leveraged from your controller:

<pre><code>module PrettyApi
 class &lt;&lt; self
 def with_nested_attributes(params, attrs)
 return if params.blank?

 case attrs
 when Hash
 with_nested_hash_attributes(params, attrs)
 when Array
 with_nested_array_attributes(params, attrs)
 when String, Symbol
 unless params[attrs].blank?
 params["#{attrs}_attributes"] = params.delete attrs
 end
 end
 params
 end

 private

 def with_nested_hash_attributes(params, attrs)
 attrs.each do |k, v|
 with_nested_attributes params[k], v
 with_nested_attributes params, k
 end
 end

 def with_nested_array_attributes(params, attrs)
 params.each do |np|
 attrs.each do |v|
 with_nested_attributes np, v
 end
 end
 end
 end
end
</code></pre>

Here's an example of this module being used in a controller, used to upload Address Books from a mobile client:

<pre><code>class V1::AddressBooksController &lt; V1::BaseController
 def create
 @address_book = AddressBook.new address_book_params
 unless @address_book.save
 errors = @address_book.errors.to_hash(true)
 render status: 422, json: { errors: errors }
 end
 end

 private

 def address_book_params
 PrettyApi.with_nested_attributes pretty_address_book_params,
 contacts: [:emails, :phones, :addresses]
 end

 def pretty_address_book_params
 params.permit(
 :device_install_id,
 contacts: [
 :local_id,
 :first_name,
 :last_name,
 :nickname,
 emails: [
 :value,
 :type
 ],
 phones: [
 :value,
 :type
 ],
 addresses: [
 :type,
 :street_address,
 :city,
 :state,
 :postal_code,
 :country
 ]
 ]
 )
 end
end
</code></pre>

Note, the syntax for declaring the nested attributes mirrors that of declaring permitted parameters in your controller.

<a href="https://gist.github.com/tlowrimore/5ce1ad28d6599072506e" rel="noreferrer">Here's the Gist for this example.</a>

I hope someone finds this helpful!

I've written an API with Rails and need to accept some nested_attributes in API calls.

Currently I send data via

PATCH /api/v1/vintages/1.json

<pre><code>{
 "vintage": {
 "year": 2014,
 "name": "Some name",
 "foo": "bar",
 "sizes_attributes": [
 {
 "name": "large",
 "quantity": "12"
 },
 {
 "name": "medium",
 "quantity": "2"
 }
 ]
 }
}
</code></pre>

However, I'd like to perform the following:

PATCH /api/v1/vintages/1.json

<pre><code>{
 "vintage": {
 "year": 2014,
 "name": "Some name",
 "foo": "bar",
 "sizes": [
 {
 "name": "large",
 "quantity": "12"
 },
 {
 "name": "medium",
 "quantity": "2"
 }
 ]
 }
}
</code></pre>

The difference being attributes being part of the key of the fields. I want to be able to <code>accept_nested_attributes_for :sizes</code> without having to use <code>_attributes</code> be a part of the JSON object.

Anyone know how to manage this?

How to accept JSON through Rails API without "_attributes" for nested fields

JSON

我已经用Rails编写了一个应用程序接口，需要在应用程序接口调用中接受一些nested_attributes。目前我通过以下方式发送数据vintages补丁/api/v1//1.json{  "vintage": {    "year": 2014,    "name": "Some name",    "foo": ...

问如何通过Rails API接受JSON而不使用嵌套字段的"_attributes“
EN

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