我有一个列出所有比较的视图
<% @comparisons.each do |comparison| %>
<div class="col-xs-6 col-sm-4 col-md3">
<p><%= comparison.title %></p>
<p><%= comparison.id %></p>
<p><%= comparison.description %></p>
</div>
<% end %>
到目前为止，一切进展顺利：每次比较都会显示标题，说明和ID。
我尝试添加一个Show链接：
<% @comparisons.each do |comparison| %>
<div class="col-xs-6 col-sm-4 col-md3">
<p><%= comparison.title %></p>
<p><%= comparison.id %></p>
<p><%= comparison.description %></p>
<p><%= link_to 'Show', comparison_path(comparison) %></p>
</div>
<% end %>
但现在，当我加载index.html.erb时出现此错误：
No route matches {:action=>"show", :controller=>"comparisons", :format=>nil, :id=>nil, :locale=>#<Comparison id: 1, title: "coucou", description: "", created_at: "2015-07-04 10:33:47", updated_at: "2015-07-04 10:33:47", user_id: 1>} missing required keys: [:id]
我不明白为什么......
class ComparisonsController < ApplicationController
before_action :set_comparison, only: [ :show ]
skip_before_action :authenticate_user!, only: [ :index, :show ]
def index
@comparisons = policy_scope(Comparison)
end
def show
end
def new
@comparison = current_user.comparisons.new
authorize @comparison
end
def create
@comparison = current_user.comparisons.new(comparison_params)
authorize @comparison
if @comparison.save
# redirect_to comparison_path(@comparison)
# redirect_to @comparison
render :show
else
render :new
end
end
private
def set_comparison
@comparison = Comparison.find(params[:id])
authorize @comparison
end
def comparison_params
params.require(:comparison).permit(:title, :description, :user_id)
end
end
顺便提一下，正如您所看到的，在创建操作中，我无法使用redirect_to。但render :show有效：show.html.erb视图已加载。
使用render而非redirect_to的任何风险？
Prefix Verb URI Pattern Controller#Action
new_user_session GET /users/sign_in(.:format) devise/sessions#new
user_session POST /users/sign_in(.:format) devise/sessions#create
destroy_user_session DELETE /users/sign_out(.:format) devise/sessions#destroy
user_password POST /users/password(.:format) devise/passwords#create
new_user_password GET /users/password/new(.:format) devise/passwords#new
edit_user_password GET /users/password/edit(.:format) devise/passwords#edit
PATCH /users/password(.:format) devise/passwords#update
PUT /users/password(.:format) devise/passwords#update
cancel_user_registration GET /users/cancel(.:format) devise/registrations#cancel
user_registration POST /users(.:format) devise/registrations#create
new_user_registration GET /users/sign_up(.:format) devise/registrations#new
edit_user_registration GET /users/edit(.:format) devise/registrations#edit
PATCH /users(.:format) devise/registrations#update
PUT /users(.:format) devise/registrations#update
DELETE /users(.:format) devise/registrations#destroy
page GET (/:locale)/pages/:id high_voltage/pages#show {:locale=>/fr/}
comparisons GET (/:locale)/comparisons(.:format) comparisons#index {:locale=>/fr/}
POST (/:locale)/comparisons(.:format) comparisons#create {:locale=>/fr/}
new_comparison GET (/:locale)/comparisons/new(.:format) comparisons#new {:locale=>/fr/}
comparison GET (/:locale)/comparisons/:id(.:format) comparisons#show {:locale=>/fr/}
home GET /home(.:format) redirect(301, /)
root GET / high_voltage/pages#show {:id=>"home"}
Rails.application.routes.draw do
devise_for :users
scope '(:locale)', locale: /fr/ do
get 'pages/:id' => 'high_voltage/pages#show', :as => :page, :format => false
resources :comparisons, only: [ :index, :show, :new, :create ]
end
end
提前感谢您的帮助。
答案 0 :(得分：1)
从您的路线文件中看，我认为要构建路线，您需要两个参数 - locale和id。由于您使用的是comparison_path(comparison)，因此rails假定您传递的第一个参数是指区域设置。
要构建正确的路线，请使用更简洁的方法构建路线 - 如下所示：
comparison_path(locale: 'en', id: comparison.id)
答案 1 :(得分：0)
或者您也可以这样使用：
<% @comparisons.each do |comparison| %>
<div class="col-xs-6 col-sm-4 col-md3">
<p><%= comparison.title %></p>
<p><%= comparison.id %></p>
<p><%= comparison.description %></p>
<p><%= link_to 'Show', comparison %></p>
</div>
<% end %>
答案 2 :(得分：0)
在我看来，使用：shallow_path就是答案。来自documentation。
：path，：as，：module，：shallow_path和：shallow_prefix选项都默认为命名空间的名称。
我认为这会从raked路线中删除（/：locale）
scope '(:locale)', locale: /fr/, :shallow_path => '(:locale)' do
get 'pages/:id' => 'high_voltage/pages#show', :as => :page, :format => false
resources :comparisons, only: [ :index, :show, :new, :create ]
end
答案 3 :(得分：0)
之前的回答让我意识到我遇到了i18n的路由问题：在网址建设中没有考虑locale参数。
在application_controller.rb中我还有
def default_url_options
{ locale: I18n.locale == I18n.default_locale ? nil : I18n.locale }
end
我添加第二个方法，自动将locale参数添加到urls
ViewController.h
@interface ViewController : UIViewController
@property(nonatomic, weak)IBOutlet UICollectionView *my_collectionview;
@end
ViewController.m
@interface ViewController ()
@end
@implementation ViewController
@synthesize my_collectionview;
- (void)viewDidLoad {
[super viewDidLoad];
}
-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView{
return 1;
}
-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
return 9;
}
-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
CollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"CollectionViewCell" forIndexPath:indexPath];
return cell;
}
CollectionViewCell.h
@interface CollectionViewCell : UICollectionViewCell
@property(nonatomic, weak) IBOutlet UIImageView *temp_imgview;
@end
CollectionViewCell.m
-(void)awakeFromNib{
[temp_imgview.layer setCornerRadius:self.temp_imgview.frame.size.width/2];
temp_imgview.layer.borderWidth=0.5;
temp_imgview.layer.masksToBounds = YES;
temp_imgview.clipsToBounds=YES;
}
现在，它运作正常。
感谢您的帮助。