Question

好的，这是关键时刻。我有一个我正在研究的项目，我无法让它工作。目前我需要创建一个搜索框，它更像是一个允许搜索的简单文本字段。问题是每当我点击搜索按钮时，我都会收到错误“找不到id = search的学生”

我不明白的是：为什么ID被分配了“搜索”的值？我不知道代码在哪里传递了这些信息。我只更改了三个文件：

class StudentsController < ApplicationController
def search
  @student = Student.where("name LIKE ?", "%#{params[:q]}%")
  render :index
end
  # GET /students
  # GET /students.json

  def index
    @students = Student.all

    respond_to do |format|
      format.html # index.html.erb
      format.json { render json: @students }
    end
  end

  # GET /students/1
  # GET /students/1.json
  def show
    @student = Student.find(params[:id])

    respond_to do |format|
      format.html # show.html.erb
      format.json { render json: @student }
    end
  end

  # GET /students/new
  # GET /students/new.json
  def new
    @student = Student.new

    respond_to do |format|
      format.html # new.html.erb
      format.json { render json: @student }
    end
  end

  # GET /students/1/edit
  def edit
    @student = Student.find(params[:id])
  end

  # POST /students
  # POST /students.json
  def create
    @student = Student.new(params[:student])
        @student.courses << Course.find(1)

    respond_to do |format|
      if @student.save
        format.html { redirect_to @student, notice: 'Student was successfully created.' }
        format.json { render json: @student, status: :created, location: @student }
      else
        format.html { render action: "new" }
        format.json { render json: @student.errors, status: :unprocessable_entity }
      end
    end
  end

  # PUT /students/1
  # PUT /students/1.json
  def update
    @student = Student.find(params[:id])
          @student.courses << Course.find(params[:course][:id])
    respond_to do |format|
      if @student.update_attributes(params[:student])
        format.html { redirect_to @student, notice: 'Student was successfully updated.' }
        format.json { head :no_content }
      else
        format.html { render action: "edit" }
        format.json { render json: @student.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /students/1
  # DELETE /students/1.json
  def destroy
    @student = Student.find(params[:id])
    @student.destroy

    respond_to do |format|
      format.html { redirect_to students_url }
      format.json { head :no_content }
    end
  end
end

Assign3::Application.routes.draw do
  resources :courses

  resources :students

    resources :courses_students

  resources :students do
  collection do
    get 'search'
  end
end
end

<h1>Listing students</h1>


<%= form_tag(search_students_url, method: "get") do %>
    <%= label_tag(:q, "Search for:") %>
    <%= text_field_tag(:q) %>
    <%= submit_tag("Search") %>
<% end %>
<table>
  <tr>
    <th>Student num</th>
    <th>First name</th>
    <th>Last name</th>
    <th>School</th>
    <th>Years attended</th>
    <th>Birthday</th>
    <th></th>
    <th></th>
    <th></th>
  </tr>

<% @students.each do |student| %>
  <tr>
    <td><%= student.student_num %></td>
    <td><%= student.first_name %></td>
    <td><%= student.last_name %></td>
    <td><%= student.school %></td>
    <td><%= student.years_attended %></td>
    <td><%= student.birthday %></td>
    <td><%= link_to 'Show', student %></td>
    <td><%= link_to 'Edit', edit_student_path(student) %></td>
    <td><%= link_to 'Destroy', student, method: :delete, data: { confirm: 'Are you sure?' } %></td>
  </tr>
<% end %>
</table>

<br />

<%= link_to 'New Student', new_student_path %>

任何指针都非常感谢，许多人提前感谢。

Answer 1

替换：

Assign3::Application.routes.draw do
  resources :courses

  resources :students

    resources :courses_students

  resources :students do
    collection do
      get 'search'
    end
  end
end

使用：

Assign3::Application.routes.draw do
  resources :courses

  resources :courses_students

  resources :students do
    collection do
      get 'search'
    end
  end
end

在路由中，规则首先匹配，首次投放，并且您有2 resources :students

Rails无法找到id = search的学生。它来自哪里？

1 个答案: