如何使用范围作为开机自检数据到轨道控制器的参数之一

Question

数据库迁移experience字段定义为范围

class CreateJobPosts < ActiveRecord::Migration[5.1]
def change
create_table :job_posts do |t|
t.string :name, null: false, limit: 100
t.string :location, null: false, limit: 100
t.int4range :experience, null: false
t.text :description, null: false
t.text :skills, null:false
t.boolean :active, null: false, default: false
t.string :seo_meta_keywords, array: true, null: false
t.string :seo_meta_description, null: false, limit: 150
t.timestamps
end
add_index :job_posts, :name, unique: true
add_index :job_posts, :location
add_index :job_posts, :active
end
end

现在在编写测试时，我让 FactoryGirl 定义了一些这样的模型

FactoryGirl.define do
factory :job_post do
name "DevOps Coach"
location "Bangalore"
experience (4..10)
description 'Test Description'
skills 'Test Skills'
active true
seo_meta_keywords ['keywords','keywords']
seo_meta_description 'dummy descriptions'
end
end

在控制器中

def job_post_params
params.require(:job_post).permit(:name, :location, :experience, :description, :skills, :active, :seo_meta_description, seo_meta_keywords: [])
end

属性哈希按预期初始化

[89, 98] in /Users/anadi/Code/bauji/spec/controllers/job_posts_controller_spec.rb
89:
90:     context "with invalid params" do
91:       it "returns a success response (i.e. to display the 'new' template)" do
92:         byebug
93:         temp = invalid_attributes
=> 94:         post :create, params: {job_post: invalid_attributes}, session: valid_session
95:         expect(response).to be_success
96:       end
97:     end
98:   end
(byebug) temp
{:name=>"No Name", :location=>"Nay", :experience=>4..10, :description=>"Test Description", :skills=>"Test skills", :active=>true, :seo_meta_keywords=>["keywords", "keywords"], :seo_meta_description=>"dummy descriptions"}

但是 POST 和 PUT 方法测试失败:experience因为控制器的属性为 nil

[24, 33] in /Users/anadi/Code/bauji/app/controllers/job_posts_controller.rb
24:   # POST /job_posts
25:   # POST /job_posts.json
26:   def create
27:     byebug
28:     @job_post = JobPost.new(job_post_params)
=> 29:     respond_to do |format|
30:       if @job_post.save
31:         format.html { redirect_to @job_post, notice: 'Job post was successfully created.' }
32:         format.json { render :show, status: :created, location: @job_post }
33:       else
(byebug) @job_post
#<JobPost:0x007fda5fb21920>
(byebug) @job_post.experience
*** ArgumentError Exception: bad value for range
nil

溶液：

# Never trust parameters from the scary internet, only allow the white list through.
def job_post_params
raw_post_params = params.require(:job_post).permit(:name, :location, :experience, :description, :skills, :active, :seo_meta_description, seo_meta_keywords: [])
range_begin, range_end = raw_post_params[:experience].split('..').map { |v| Integer(v) }
raw_post_params[:experience] = Range.new(range_begin, range_end)
raw_post_params
end

它可以更紧凑吗？

Answer 1

当您发出 POST 请求时，4..10很可能转换为String："4..10"。尝试使用类似于以下内容的内容解析控制器中的字符串：

range_begin, range_end = params[:experience].split('..').map { |v| Integer(v) }
experience = Range.new(range_begin, range_end)

然后，您可以将该experience设置为在JobPost上归因