rails link_to_add_fields不使用has_many:through添加字段(内部具有嵌套形式) [英] rails link_to_add_fields not adding fields with has_many :through (with nested form inside)
问题描述
我的link_to_add_fields代码可用于许多其他模型，但是在这里不起作用.我使用Ryan Bates屏幕演员来模拟我的工作方式.
I have the link_to_add_fields code working for many other models, but here it is not working. I use Ryan Bates screen casts to model how I do mine.
可能与此不同的是，我在一个局部中有2个嵌套模型.表字段的一半来自模型a(期刊)，另一半来自模型b(journal_entries)，所有字段均基于租约模型.
What might different with this is that I have 2 nested models in one partial. Half the table fields are from model a (journals), and the other are from model b (journal_entries) and all are based off a Leases model.
该表如下所示，[xx]是输入字段.看起来有点像数据网格.
The table looks like the following, [xx] are input fields. It looks kinda like a data grid.
Dated |Memo |Account |Credit |
-----------------------------------------------------------
[a.dated] |[a.memo] |[b.account_name] |[b.credit] |....
[a.dated] |[a.memo] |[b.account_name] |[b.credit] |....
[a.dated] |[a.memo] |[b.account_name] |[b.credit] |....
(Link:Click to add another row)
当我检查生成的html中的link_to_add_fields时，请参阅:
When I inspect the link_to_add_fields in the produced html is see:
<a href="#" class="add_fields" data-fields="<fieldset style="
border:0px none;padding:0px .625em;"> </fieldset>"
data-id="-629772378">+ Add transactions</a>
我希望采取的行动更多……显然，当我单击链接时，什么也没有发生.
I expected a lot more action than that... Obviously when I click the link, nothing happens.
_journals_form.html.erb
_journals_form.html.erb
<div>
<%= f.fields_for :journals do |journals| %>
<%= render "journal_fields" , {f: journals} %>
<% end %>
<%= link_to_add_fields "+ Add transactions", f, :journals %>
</div>
_journal_fields.html.erb，请注意嵌套的f.fields_for以及f.attribute和g.attribute的混合
_journal_fields.html.erb, Notice the nested f.fields_for and the mix of f.attribute and g.attribute
<fieldset style="border:0px none;padding:0px .625em;">
<%= f.fields_for :journal_entries do |g| %>
<table>
<tr>
<td style="width:200px;font-size:.7em"><%= f.date_select :dated %></td>
...
<td style="width:100px;"><%= g.text_field :account_name, size: 8 %></td>
<td style="width:100px;"><%= g.hidden_field :_destroy %><%= link_to "remove", '#', class: "remove_fields" %></td>
</tr>
</table>
<% end %>
</fieldset>
我的控制器似乎可以编辑/更新并添加两个模型(journals和journal_entries)的行，除了remove链接有问题...
My controller appears to edit/update and add rows of both models (journals and journal_entries) except that the remove link is buggy...
def edit
@lease = Lease.find(params[:id])
@lease.tenants.build
1.times do
journal = @lease.journals.build
journal.journal_entries.build
end
end
def update
@lease = Lease.find(params[:id])
if @lease.update_attributes(params[:lease])
redirect_to edit_pm_lease_path(@lease), notice: 'Lease was successfully updated.'
else
render action: "edit"
end
end
该模型基于租赁".租赁有许多日记，以及通过日记的许多日记条目.这就是我们跟踪给定租约的付款和账单的方式.租赁也有许多租户(这个add_fields ...很好用).
The model is based off Leases. Leases have many journals and many journal entries through journals. This is how we keep track of payments and bills for a given lease. Leases also has many tenants (and this add_fields... works great).
Lease.rb
class Lease < ActiveRecord::Base
...
has_many :tenants
has_many :journals, :order => [:dated, :id] #, :conditions => "journals.lease_id = id"
has_many :journal_entries, :through => :journals
accepts_nested_attributes_for :tenants , :reject_if => lambda { |a| a[:name].blank? }, :allow_destroy => true
accepts_nested_attributes_for :journal_entries , :allow_destroy => true
accepts_nested_attributes_for :journals , :allow_destroy => true
#Below didn't seem to help or hinder so it's removed.
#accepts_nested_attributes_for :journals, :journal_entries, :allow_destroy => true
...
end
journal.rb
journal.rb
class Journal < ActiveRecord::Base
...
belongs_to :lease, :conditions => :lease_id != nil
has_many :journal_entries
accepts_nested_attributes_for :journal_entries , :allow_destroy => true
end
journal_entry.rb
journal_entry.rb
class JournalEntry < ActiveRecord::Base
belongs_to :journal
end
link_to_add_fields帮助器:(来自Ryan bates railscasts的参考(第EPISODE#196)
link_to_add_fields helper: (References from Ryan bates railscasts (EPISODE #196)
module ApplicationHelper
def external_link_to(label, target, options = [])
#length = 25 #options[:length] ||= 25
#window = options[:target] ||= "new"
unless target.downcase.start_with?("http://","https://")
link = "http://" + target.strip
end
link_to target, link, :target => "new"
end
def link_to_add_fields(name, f, association)
new_object = f.object.send(association).klass.new
id = new_object.object_id
fields = f.fields_for(association, new_object, child_index: id) do |builder|
render(association.to_s.singularize + "_fields", f: builder)
end
link_to(name, '#', class: "add_fields", data: {id: id, fields: fields.gsub("\n", "")})
end
end
不确定我在哪里出错了，数据的添加和删除正在工作，但是仅journal/journal_entry表单的link_to_add_fields没有响应.我没有使用nested_form gem，如果有所不同...
Not sure where I went wrong with this one, the adding and removing of the data are working, but the link_to_add_fields for only the journal/journal_entry form is not responding as it should. I'm not using the nested_form gem, if that makes a difference...
我正在使用Rails 3.2.12，Ruby 1.9.3
I'm using Rails 3.2.12, Ruby 1.9.3
任何帮助将不胜感激.
推荐答案
通过删除fields_for代码博客来修改journal_fields.hrml.erb文件.用于为Lease类添加嵌套的将军.
Modify your journal_fields.hrml.erb file with removing fields_for code blog. for add nested generals for Lease class.
<fieldset style="border:0px none;padding:0px .625em;">
<table>
<tr>
<td style="width:200px;font-size:.7em"><%= f.date_select :dated %></td>
# Your form field
<td style="width:100px;"><%= g.text_field :account_name, size: 8 %></td>
<td style="width:100px;"><%= g.hidden_field :_destroy %><%= link_to "remove", '#', class: "remove_fields" %></td>
</tr>
</table>
</fieldset>
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