Ruby on rails 如何在一对多关联上返回父级?
Rails 3.0.4 考虑到以下关系Ruby on rails 如何在一对多关联上返回父级?,ruby-on-rails,activerecord,Ruby On Rails,Activerecord,Rails 3.0.4 考虑到以下关系 class Child < ActiveRecord::Base belongs_to :parent end class Parent < ActiveRecord::Base has_many :children end 将返回每个父对象及其子对象 每个子级如何还包括对其父级的引用,以便在序列化过程中使用 例如,采用JSON格式,如下所示: [ { "parent": {
class Child < ActiveRecord::Base
belongs_to :parent
end
class Parent < ActiveRecord::Base
has_many :children
end
将返回每个父对象及其子对象
每个子级如何还包括对其父级的引用,以便在序列化过程中使用
例如,采用JSON格式,如下所示:
[
{
"parent": {
"created_at": "2012-05-05T11:29:19Z",
"id": 1,
"updated_at": "2012-05-05T11:29:19Z",
"children": [
{
"created_at": "2012-05-05T11:35:05Z",
"id": 1,
"updated_at": "2012-05-05T11:35:05Z",
"parent": {
"created_at": "2012-05-05T11:29:19Z",
"id": 1,
"updated_at": "2012-05-05T11:29:19Z"
}
}
]
}
}
]
您应该在
子
模型上覆盖到\u json
方法:
class Child
belongs_to :parent
def to_json
attributes.merge(parent: parent.attributes).to_json
end
end
class Child
belongs_to :parent
def to_json
attributes.merge(parent: parent.attributes).to_json
end
end
@parents = Parent.find(:all, :include => {:children => :parent})