在Rails中嵌套强参数-预期为AssociationTypeMismatch MYMODEL，得到了ActionController :: Parameters() [英] Nested strong parameters in rails - AssociationTypeMismatch MYMODEL expected, got ActionController::Parameters()

问题描述

我正在渲染一个模型，它是JSON的子书，如下所示:

I'm rendering a model and it's children Books in JSON like so:

{"id":2,"complete":false,"private":false, "books" [{ "id":2,"name":"Some Book"},.....

然后我通过将相同的JSON传递回我的控制器来更新此模型，并且出现以下错误:

I then come to update this model by passing the same JSON back to my controller and I get the following error:

ActiveRecord :: AssociationTypeMismatch(预期为Book(#2245089560)，已获得ActionController :: Parameters(#2153445460))

ActiveRecord::AssociationTypeMismatch (Book (#2245089560) expected, got ActionController::Parameters(#2153445460))

在我的控制器中，我正在使用以下内容进行更新:

In my controller I'm using the following to update:

@project.update_attributes!(project_params)

private

def project_params
    params.permit(:id, { books: [:id] } )
end

无论我在permit中将哪些属性列入白名单，我似乎都无法保存子模型.

No matter which attributes I whitelist in permit I can't seem to save the child model.

我缺少明显的东西吗?

更新-另一个示例:

控制器:

def create
    @model = Model.new(model_params)
end
def model_params
    params.fetch(:model, {}).permit(:child_model => [:name, :other])
end

请求:

post 'api.address/model', :model => { :child_model => { :name => "some name" } }

型号:

accepts_nested_attributes_for :child_model

错误:

期望ChildModel，获得了ActionController :: Parameters

expected ChildModel, got ActionController::Parameters

尝试此方法无济于事: http://www .rubyexperiments.com/using-strong-parameters-nested-forms/

Tried this method to no avail: http://www.rubyexperiments.com/using-strong-parameters-with-nested-forms/

推荐答案

我正在使用Angular.js&轨道与Rails序列化程序，这对我有用:

I'm using Angular.js & Rails & Rails serializer, and this worked for me:

模型:

• has_many:功能
• accepts_nested_attributes_for:功能

ModelSerializer :

• has_many:features，根目录::features_attributes

控制器:

• params.permit features_attributes:[:id，:enabled]

AngularJS :

model.features_attributes中的
• ng-repeat ="feature按feature.id进行跟踪

• ng-repeat="feature in model.features_attributes track by feature.id

这篇关于在Rails中嵌套强参数-预期为AssociationTypeMismatch MYMODEL，得到了ActionController :: Parameters()的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！