所以我正在开发一个应用程序,但是,当我去显示模块记录时,它们都会被显示,包括不应该显示的记录。
上下文
我有三个模型,course
,course_modules
和course_exercises
。我试图在课程显示页面上显示属于该课程的模块,但我只想显示属于该课程的course_modules
。
show.html.erb
<section class="flex h-64 hero-banner p-4">
<section class="flex items-center mx-auto">
<h2 class="uppercase">
<%= @course.title %>
</h2>
</section>
</section>
<section class="pt-4 px-4">
<section class="w-full">
<section class="rounded overflow-hidden shadow">
<section style="padding: 56.25% 0 0 0; position: relative;">
<iframe src="https://player.vimeo.com/video/<%= @course.trailer %>" style="position: absolute; top: 0; left: 0; width: 100%; height: 100%;" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>
</section>
</section>
</section>
<section class="flex flex-wrap -mx-4">
<section class="w-full lg:w-3/4 p-4">
<section class="bg-grey-lightest shadow text-grey-darker p-4">
<h2 class="font-normal mb-4">Course description</h2>
<p class="font-normal whitespace-pre-wrap"><%= @course.description %></p>
</section>
</section>
<section class="w-full lg:w-1/4 p-4">
<section class="bg-grey-lightest shadow text-grey-darker p-4 mb-4">
<h3 class="font-normal mb-4">Course Price</h3>
<p class="font-bold text-3xl text-green">£<%= @course.price %></p>
</section>
<%= button_to "Buy now", "#", class: "bg-blue hover:bg-blue-dark w-full text-white font-semibold py-3 px-4 border-2 rounded-sm border-blue-dark shadow outline-none" %>
<section class="bg-grey-lightest shadow text-grey-darker py-4 px-4 mt-4">
<h3 class="font-normal mb-4">Course Modules</h3>
<% @course_modules.each do |course_module| %>
<section class="py-2 border-b-2 border-light modules">
<%= course_module.title %>
</section>
<% end %>
</section>
</section>
</section>
</section>
courses_controller
def show
@course_modules = CourseModule.all
end
course.rb
class Course < ApplicationRecord
has_many :course_modules
validates :title, :summary, :description, :trailer, :price, presence: true
end
course_module.rb
class CourseModule < ApplicationRecord
belongs_to :course
end
schema.rb
create_table "course_modules", force: :cascade do |t|
t.string "title"
t.integer "course_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.index ["course_id"], name: "index_course_modules_on_course_id"
end
create_table "courses", force: :cascade do |t|
t.string "title"
t.text "summary"
t.text "description"
t.string "trailer"
t.integer "price"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
这是数据库的屏幕截图
测试模块属于第一门课程,而模块#1属于第二门课程,但是,无论如何,这两个模块都显示
感谢您的帮助。
答案 0 :(得分:0)
好吧,如果这是一场表演,我想它应该只表演一门课程。我们需要一个ID。所以
def show
course = Course.find(params[:id])
@course_modules = course.course_modules
end
我正在做的很简单,并假设您确定找到这门课程。