在Rails4..中使用fields_for不会保存新字段

我正试图在我正在处理的项目中使用fields_for helper方法。原始表单工作正常，保存也很好。新属性不保存，我得到了一个NoMethodError和一个未定义的方法。我错过了什么？！

这是我的上市模型：

class Listing < ActiveRecord::Base
has_one :listing_commerical_attribute
accepts_nested_attributes_for :listing_commerical_attribute, :allow_destroy => true

这是我的listing_commercial_attribute模型：

class ListingCommercialAttribute < ActiveRecord::Base
belongs_to :listing
accepts_nested_attributes_for :listing
end

这是我的控制器：

def new
@listing.build_listing_commercial_attribute
respond_to do |format|
format.html # new.html.erb
format.json { render json: @listing }
end
end
private
def commercial_params
params.require(:commerical_listing_attribute)
.permit(:gas_pipe_size,
:amperage,
:basement_ceiling_height,
:ceiling_height,
:door_size,
:zoning,
:previous_use,
:community_board,
:delivery_date,
:key_money,
:security_deposit,
:price_per_sq_ft,
:did_size)
end

这是我的_form.html.erb:

<h2 class="text-center">Commercial</h2>
<%= f.fields_for :listing_commerical_attributes do |ff| %>
<div class="field">
<%= ff.label :gas_pipe_size, "Gas Pipe Size", class: "general-text-label" %>
<%= ff.number_field :gas_pipe_size, class: "general-text-field" %>
</div>
<div class="field">
<%= ff.label :amperage, "Amperage", class: "general-text-label" %>
<%= ff.number_field :amperage, class: "general-text-field" %>
</div>
<div class="field">
<%= ff.label :ceiling_height, "Ceiling Height", class: "general-text-label" %>
<%= ff.number_field :ceiling_height, class: "general-text-field" %>
</div>
<div class="field">
<%= ff.label :basement_ceiling_height, "Basement Ceiling Height", class: "general-text-label" %>
<%= ff.number_field :basement_ceiling_height, class: "general-text-field" %>
</div>
<div class="field">
<%= ff.label :door_size, "Door Size", class: "general-text-label" %>
<%= ff.number_field :door_size, class: "general-text-field" %>
</div>
<div class="field">
<%= ff.label :zoning, "Zoning", class: "general-text-label" %>
<%= ff.text_field :zoning, class: "general-text-field" %>
</div>
<div class="field">
<label for="tenant_improvements" class="general-text-label">Tenant Improvements <small>(If Applicable)</small></label>
<%= ff.text_area :tenant_improvements, :rows => "4", class: "general-text-area" %>
</div>
<div class="field">
<label for="previous_use" class="general-text-label">Previous Use <small>(If Applicable)</small></label>
<%= ff.text_area :previous_use, :rows => "4", class: "general-text-area" %>
</div>
<div class= "field">
<%= ff.label :community_board, "Community Board", class: "general-text-label" %>
<%= ff.text_field :community_board, class: "general-text-field" %>
</div>
<div class="field">
<%= ff.label :delivery_date, "Delivery Date", class: "general-text-label" %>
<div class="input-group">
<span class="input-group-addon"><i class="nklyn-icon-calendar"></i></span>
<%= ff.text_field :delivery_date, :class => "datepicker general-text-field" %>
</div>
<div class="field">
<%= ff.label :key_money, "Key Money", class: "general-text-label" %>
<div class="input-group">
<span class="input-group-addon"><i class="nklyn-icon-money-bills"></i></span>
<%= f.text_field :key_money, class: "general-text-field", value: number_with_precision(f.object.price, delimiter: ',', precision: 0) %>
</div>
</div>
<div class="field">
<%= ff.label :security_deposit, "Security Deposit", class: "general-text-label" %>
<div class="input-group">
<span class="input-group-addon"><i class="nklyn-icon-money-bills"></i></span>
<%= f.text_field :security_deposit, class: "general-text-field", value: number_with_precision(f.object.price, delimiter: ',', precision: 0) %>
</div>
</div>
<div class="field">
<%= ff.label :price_per_sq_ft, "Price Per Sq Ft", class: "general-text-label" %>
<div class="input-group">
<span class="input-group-addon"><i class="nklyn-icon-money-bills"></i></span>
<%= f.text_field :price_per_sq_ft, class: "general-text-field", value: number_with_precision(f.object.price, delimiter: ',', precision: 0) %>
</div>
</div>
<div class="field">
<%= ff.label :did_size, "Drive In Doors Size", class: "general-text-label" %>
<%= ff.number_field :did_size, class: "general-text-field" %>
</div>
<% end %>

更新

我对ListingCommercialAttribute模型进行了更改，并删除了的接受嵌套属性。
我把f.fields_for改成单数，而不是复数。

我在父属性(见下文)之后添加了嵌套属性

def listing_params
params.require(:listing)
.permit(:access,
:address,
:apartment,
:cats_ok,
:cross_streets,
:dogs_ok,
:latitude,
:longitude,
:amenities,
:date_available,
:bathrooms,
:bedrooms,
:description,
:fee,
:exclusive,
:featured,
:rental,
:residential,
:landlord_contact,
:listing_agent_id,
:sales_agent_id,
:neighborhood_id,
:pets,
:photo,
:photo_tag,
:primaryphoto,
:price,
:square_feet,
:station,
:status,
:subway_line,
:term,
:title,
:utilities,
:move_in_cost,
:owner_pays,
:private,
:office_id,
:full_address,
:zip,
:convertible,
:landlord_llc,
:pinned,
:image,
listing_commercial_attribute_attributes: [
:gas_pipe_size,
:amperage,
:basement_ceiling_height,
:ceiling_height,
:door_size,
:zoning,
:previous_use,
:community_board,
:delivery_date,
:key_money,
:security_deposit,
:price_per_sq_ft,
:did_size])
end

以下是我的新控制器操作：

def edit
@listing.attributes = listing_params
end
def create
@listing.attributes = listing_params
respond_to do |format|
if @listing.save
format.html { redirect_to @listing, notice: 'Listing was successfully created.' }
format.json { render json: @listing, status: :created, location: @listing }
else
format.html { render action: "new", notice: "Correct the mistakes below to create the new listing" }
format.json { render json: @listing.errors, status: :unprocessable_entity }
end
end
end

但现在我在Listings中得到一个NoMethodError#show错误。我为商业属性创建了一个分部。既然他们已经是强者了，难道不应该把他们包括在内吗？还是我完全误解了这一点？！

这是部分：

Gas Pipe Size: <%= listing_commercial_attributes.gas_pipe_size(@listing) %>
Amperage: <%= listing_commercial_attribute.amperage(@listing) %>
Basement Ceiling Height: <%= listing_commercial_attribute.basement_celing_height(@listing) %>
Ceiling Height: <%= listing_commercial_attribute.ceiling_height(@listing) %>
Door Size: <%= listing_commercial_attribute.door_size(@listing) %>
Zoning: <%= listing_commercial_attribute.zoning(@listing) %>
Build to Suit: <%= listing_commercial_attribute.build_to_suit(@listing) %>
Previous Use: <%= listing_commercial_attribute.previous_use(@listing) %>
Community Board: <%= listing_commercial_attribute.community_board(@listing) %>
Delivery Date: <%= listing_commercial_attribute.delivery_date(@listing) %>
Key Money: <%= listing_commercial_attribute.key_money(@listing) %>

更新#2

我把它改成单数。

这是一个完整的错误。

NameError in Listings#show

显示/Users/Code/app/views/listings/commercial_attributes.html.erb，其中第1行出现：

#<#的未定义局部变量或方法"listing_commercial_attribute"：0x007f86606f6a10>你是说？listing_collection_url

燃气管道尺寸：<%=listing_commercial_attribute.gas_pipe_size(@listing)%>
安培数：<%=listing_commercial_attribute.amperage(@listing)%>
地下室天花板高度：<%=listing_commercial_attribute.basicent_celing_height(@listing)%>
天花板高度：<%=listing_commercial_attribute.ceiling_height(@listing)%>
门尺寸：<%=listing_commercial_attribute.door_size(@listing)%>
分区：<%=listing_commercial_attribute.分区(@listing)%>

模板包含的跟踪：app/views/listings/listing_tent_area.html.erb、app/views/show.html.erb

更新#3

def show
@my_listing_collections = ListingCollection.with_agent(current_agent).order("created_at DESC")
@listing_commercial_attributes = ListingCommercialAttribute.find(params[:id])
@regions = Region.order(name: :asc)
@listing = Listing.includes(:photos, :likes, :interested_agents).find(params[:id])
if @listing.private && cannot?(:create, Listing)
redirect_to listings_path, notice: 'This listing is no longer available'
else
agent = Agent.where(id: params[:agent_id]).first
@page = Listings::ShowView.new(@listing, agent)
respond_to do |format|
format.html
end
end
end

我一直收到这个错误：

ActiveRecord:：RecordNotFound in ListingsController#show

找不到'id'=5755 的ListingCommercialAttribute

它正在搜索id为5755的商业属性，但这是列表id。我不确定该传递什么。。。

不要在两个模型上定义accepts_nested_attributes_for。仅在父模型上。否则，您将遇到循环依赖性问题。在这种情况下，父模型看起来像是一个Listing，因此从ListingCommercialAttribute中删除accepts_nested_attributes_for :listing
f.fields_for的第一个参数应该是关联的名称，而你的参数有点偏离。你有has_one : listing_commerical_attribute，所以你想要f.fields_for : listing_commerical_attribute
强参数应该首先需要父对象，其次包括嵌套对象。此外，必须将_attributes附加到嵌套属性名称的末尾

因此，对于3:

def listing_params
params.require(:listing)
.permit(:id,
# ...
listing_commercial_attribute_attributes: [ # Note: _attributes
:gas_pipe_size,
# ...
])
end

在创建/编辑操作中，请确保从强参数方法设置参数：@listing.attributes = listing_params

请参阅有关accepts_nested_attributes_for和强参数的文档。

更新

更新#2

更新#3

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