Question

我遇到的问题是在一对一的关系中使用两种模型播种数据库。

分贝/ seed.rb

 auser = User.create!(email: "example@test.org",
          password:              "example",
          password_confirmation: "example", 
          admin: true )
         # profile_attributes: [name: "Example Test",
         # street: "75 Barracks Rd",
         # city: "Water,
         # sex: "Male"]
         # )
auser.profile.create!( name: "Example Test",
           street: "75 Barracks Rd",
           city: "Waterloo",
           state: "AW", 
           zipcode: "23455",
           #sex: "Male" 
           )

 99.times do |n|
   name  = Faker::Name.name
   email = "example-#{n+1}@railstutorial.org"
   street = Faker::Address.street_address
   city = Faker::Address.city
   state = Faker::Address.state_abbr
   zipcode = Faker::Address.zip_code
   password = "password"
   n.User.create!(email: email,
           password:              password,
           password_confirmation: password )
     # profile_attributes: [name: name, sex: sex, street: street, city: city, state: state, zipcode: zipcode])  
   #  n.profile.create!( name: name, street: street, city: city, state: state, zipcode: zipcode ) 
  n.each { |user| user.profile.create( name: name, street: street, city: city, state: state, zipcode: zipcode) }
end

如果我在seed.rb文件中使用profile_attributes作为注释，我会收到错误NoMethodError: undefined method "with_indifferent_access" for #<Array:0x86e46a0>，但如果我按照当前的方式离开，我会收到错误SyntaxError: C:/Sites/NouveauMiniOlympics/db/seeds.rb:37: syntax error, unexpected '\n', expecting =>

**用户控制器中的用户参数**

  def user_params
            params.require(:user).permit(:id, :email, :password, :password_confirmation, profile_attributes: [:name, :street, :city, :state, :zipcode] )
  end

Answer 1

with_indifferent_access是一个Rails ActiveSupport方法，它接受一个哈希并返回一个HashWithIndiffentAccess，如果你使用符号或字符串来访问它的属性，它就不在乎了。

irb(main):002:0> hash = { foo: "bar" }
=> {:foo=>"bar"}
irb(main):003:0> hash["foo"]
=> nil
irb(main):004:0> hash.with_indifferent_access[:foo]
=> "bar"
irb(main):005:0>

那是什么意思？当rails期望哈希时，你传入一个数组。

profile_attributes: [name: name, sex: sex, street: street, city: city, state: state, zipcode: zipcode]

最简单的解决方案是：

profile_attributes:  { name: name, sex: sex, street: street, city: city, state: state, zipcode: zipcode }

但是如果我们只打算使用它们一次，我们真的不想输出所有这些变量！

99.times do |n|
  User.create!(
    email: Faker::Internet.safe_email, # "name@example.org"
    password: 'password',
    password_confirmation: 'password'
    profile_attributes: {
      name  : Faker::Name.name,
      street : Faker::Address.street_address,
      city : Faker::Address.city,
      state : Faker::Address.state_abbr,
      zipcode : Faker::Address.zip_code
    }
  )
end

在rails

1 个答案: