Javascript 使用mongoid的字段嵌入许多嵌套文档
试图将此railscast用作指南: 遇到这个错误:Javascript 使用mongoid的字段嵌入许多嵌套文档,javascript,mongodb,ruby-on-rails-3.1,mongoid,Javascript,Mongodb,Ruby On Rails 3.1,Mongoid,试图将此railscast用作指南: 遇到这个错误: `@search[queries_attributes][new_queries][queries' is not allowed as an instance variable name 型号: #search.rb class Search include Mongoid::Document include Mongoid::Timestamps belongs_to :user field :name,
`@search[queries_attributes][new_queries][queries' is not allowed as an instance variable name
型号:
#search.rb
class Search
include Mongoid::Document
include Mongoid::Timestamps
belongs_to :user
field :name, :type => String
embeds_many :queries
accepts_nested_attributes_for :queries, :reject_if => lambda { |a| a[:content].blank? }, :allow_destroy => true
#query.rb
class Query
include Mongoid::Document
field :columns, :type => String
field :types, :type => String
field :keywords, :type => String
embedded_in :search, :inverse_of => :queries
end
搜索控制器:
def new
@search = Search.new
@search.queries.build
#3.times { @search.queries.build }
end
_form.html.haml部分:
= form_for(@search) do |f|
= f.label 'Name this search'
= f.text_field :name, :class => 'text_field'
= render :partial => 'query', :collection => @search.queries, :locals => { :f => f }
= link_to_add_fields "Add Query", f, :queries
.actions
= f.submit
.fields
= f.fields_for "queries[]", query do |q|
= q.label 'Search Datatype'
= q.select :types, Query::TYPES
= q.label 'In Column'
= q.select :columns, @search.record_columns
= q.label 'For Keywords:'
= q.text_field :keywords, :class => 'text_field'
= q.hidden_field :_destroy
= link_to_function "remove", "remove_fields(this)"
_query.html.haml部分:
= form_for(@search) do |f|
= f.label 'Name this search'
= f.text_field :name, :class => 'text_field'
= render :partial => 'query', :collection => @search.queries, :locals => { :f => f }
= link_to_add_fields "Add Query", f, :queries
.actions
= f.submit
.fields
= f.fields_for "queries[]", query do |q|
= q.label 'Search Datatype'
= q.select :types, Query::TYPES
= q.label 'In Column'
= q.select :columns, @search.record_columns
= q.label 'For Keywords:'
= q.text_field :keywords, :class => 'text_field'
= q.hidden_field :_destroy
= link_to_function "remove", "remove_fields(this)"
搜索帮助程序:
module SearchesHelper
def link_to_add_fields(name, f, association)
new_object = f.object.class.reflect_on_association(association).klass.new
fields = f.fields_for(association, new_object, :child_index => "new_#{association}") do |builder|
render(association.to_s.singularize , :f => builder)
end
link_to_function(name, h("add_fields(this, \"#{association}\", \"#{escape_javascript(fields)}\")"))
end
end
javascript:
function remove_fields(link) {
$(link).prev("input[type=hidden]").val("1");
$(link).closest(".fields").hide();
}
function add_fields(link, association, content) {
var new_id = new Date().getTime();
var regexp = new RegExp("new_" + association, "g");
$(link).parent().before(content.replace(regexp, new_id));
}
当线路:
= link_to_add_fields "Add Query", f, :queries
如果被注释掉,它将按预期工作,但我需要能够添加其他查询
通过这个助手。
对于测试多个查询,我将触发控制器中的创建3.5次
在错误消息中,最后一个“]”也被删除。。不知道我错过了什么
对不起,所有的标签,但不确定问题出在哪里两个想法:
我会将查询类命名为其他名称,根据您指定的错误消息,它可能与mongoid中的某些内容冲突:
@search[querys\u attributes][new\u querys][querys'不允许作为实例变量名]
在谷歌上搜索你的问题时,我发现:
某些内容在不应为零的地方必须为零。看起来这就是解决方案:
= f.fields_for :queries, query do |q|
调用方法
link\u to\u add\u fields
-->form\u for->fields\u for(from function)->fields\u for(from partial)
时,为调用嵌套了fields\u。泰勒已经指出,可能会有命名冲突