这是一个愚蠢的例子,但我试图了解事情是如何在 Rails 的幕后传递的。并且可能有更好的“Rails”方法来解决这个问题......如果是这样,请告诉我。我有:
Warren has_many Rabbits
Rabbit belongs_to Warren
我列出了现有的兔子,然后提供了一个添加新兔子的表格。
沃伦斯/show.html.haml
%h1 This Warren
%h2 Rabbits
= render @warren.rabbits, :target => @warren
%h2 Add a rabbit:
= render "rabbits/form", :parent => @warren, :foreign_key => :warren_id
= link_to 'Edit', edit_warren_path(@warren)
\|
= link_to 'Back', warrens_path
有用。我可以在查看 Warren 的展示视图时添加和销毁兔子。问题是Flash消息 ( :success
, :notice
) 和/或rabbit.errors
没有显示在视图上/视图中。现在,我没有accepts_nested_attributes_for
在我的 warren.rb 模型中使用。但这主要是有效的。学习 Rails 很想知道发生了什么以及如何让我的消息流畅地流动......
兔子/_form.html.haml
= form_for ([parent, parent.rabbits.build]) do |f|
= render "shared/error_messages", :target => parent
.field
= f.label :name
= f.text_field :name
.field
= f.label :color
= f.text_field :color
.field
= f.hidden_field foreign_key
.actions
= f.submit 'Save'
布局/application.html.haml
!!!
%html
%head
...
%body
.container
- flash.each do |key, value|
%div{ :class => ['flash', key] }= value
= yield
rabbits_controller.rb
class RabbitsController < ApplicationController
def create
@warren = Warren.find(params[:warren_id])
@rabbit = @warren.rabbits.create(params[:rabbit])
redirect_to @warren
end
def destroy
@warren = Warren.find(params[:warren_id])
@rabbit = @warren.rabbits.find(params[:id])
@rabbit.destroy
redirect_to @warren
end
共享/_error_messages.html.haml
-if target.errors.any?
#error_explanation
%h2= "#{pluralize(target.errors.count, "error")} prohibited this record from being saved:"
%ul
- target.errors.full_messages.each do |msg|
%li= msg