在以下示例中:
class Band
include Mongoid::Document
has_and_belongs_to_many :tags
end
class Tag
include Mongoid::Document
field :name, type: String
has_and_belongs_to_many :bands
end
对象存储如下:
# The band document.
{
"_id" : ObjectId("4d3ed089fb60ab534684b7e9"),
"tag_ids" : [ ObjectId("4d3ed089fb60ab534684b7f2") ]
}
# The tag document.
{
"_id" : ObjectId("4d3ed089fb60ab534684b7f2"),
"band_ids" : [ ObjectId("4d3ed089fb60ab534684b7e9") ]
}
是否可以将字段tag_ids
重命名为tags
,将band_ids
重命名为bands
?感谢
答案 0 :(得分:0)
您可以使用以下语法来使用特定的外键名称:
class Band
include Mongoid::Document
has_and_belongs_to_many :tags, foreign_key: "bands"
end
class Tag
include Mongoid::Document
field :name, type: String
has_and_belongs_to_many :bands, foreign_key: "tags"
end
但请避免使用可能与您的可用关系冲突的外键名称。