问题描述
限时送ChatGPT账号..我有以下错误:
ERROR["test_character_should_be_valid", CharacterTest, 0.214787]test_character_should_be_valid#CharacterTest (0.21s)NoMethodError:NoMethodError:$1"的未定义方法`val':Arel::Nodes::BindParamapp/models/user.rb:11:in `block in '测试/模型/character_test.rb:8:在设置"中 来自以下测试:test/models/character_test.rb:
需要 'test_helper'类 CharacterTest <ActiveSupport::TestCase定义设置@user = User.new(name: "Example User", email: "user@example", callsign: "example",密码:foobar"，password_confirmation:foobar")@user.save@character = @user.character结尾测试字符应该有效"做断言@character.valid?结尾结束 # 字符测试在 gemfile 中:
gem 'arel', '6.0.0.beta2'character.rb:
class 字符 <ActiveRecord::Base归属地:社交，多态:真结尾user.rb:
class User 我找不到有关此特定 arel 错误的任何信息.我的 arel gem 是 6.0.0.beta2，它似乎解决了其他问题(如 此处).以前有人见过这样的吗?
解决方案事实证明这不是 Arel 错误 - 这是因为列 sociable_id 和 sociable_type没有在架构中定义.我愚蠢的错误.由于缺少外键，Arel 引发了异常.但是，Arel 此处有改进的错误消息:https://github/rails/rails/commit/78bd18a90992e3459d78bd18a90992e3459d767aI have the following error:
ERROR["test_character_should_be_valid", CharacterTest, 0.214787]
test_character_should_be_valid#CharacterTest (0.21s)
NoMethodError: NoMethodError: undefined method `val' for "$1":Arel::Nodes::BindParam
app/models/user.rb:11:in `block in <class:User>'
test/models/character_test.rb:8:in `setup'
From the following test: test/models/character_test.rb:
require 'test_helper'
class CharacterTest < ActiveSupport::TestCase
def setup
@user = User.new(name: "Example User", email: "user@example", callsign: "example",
password: "foobar", password_confirmation: "foobar")
@user.save
@character = @user.character
end
test "character should be valid" do
assert @character.valid?
end
end # CharacterTest
In the gemfile:
gem 'arel', '6.0.0.beta2'
character.rb:
class Character < ActiveRecord::Base
belongs_to :sociable, polymorphic: true
end
user.rb:
class User < ActiveRecord::Base
has_one :character, as: :sociable
before_validation do
self.create_character unless character # line 11
end
.
.
end
I can't find anything about this particular arel error. My arel gem is 6.0.0.beta2, which seems to fix other problems (as in here). Has anyone seen anything like this before?
解决方案It turns out this isn't an Arel error - it's because the columns sociable_id and sociable_type weren't defined in the schema. My stupid mistake. Arel was raising an exception because the foreign key was missing. However there is an improved error message at Arel here: https://github/rails/rails/commit/78bd18a90992e3da767cfe492f1bc5d63077da8a
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