我收到以下rspec错误，因为关联CustomField为nil，但是它应该由Factorybot生成并且我无法弄清楚为什么不是。项目关联工作正常。
Rspec测试：
it { should belong_to(:custom_field) }
it { should validate_presence_of(:custom_field) }
Rspec错误：
NoMethodError: undefined method `cf_type' for nil:NilClass
0) CustomFieldValue validations should validate that :custom_field_id cannot be empty/falsy
Failure/Error: ["single_select", "multi_select", "radiobutton", "checkbox", "label"].include?(custom_field.cf_type)
NoMethodError:
undefined method `cf_type' for nil:NilClass
# ./app/models/custom_field_value.rb:13:in `option_field?'
# ./spec/models/custom_field_value_spec.rb:18:in `block (3 levels) in <top (required)>'
NoMethodError: undefined method `cf_type' for nil:NilClass
0) CustomFieldValue validations should belong to custom_field required: true
Failure/Error: ["single_select", "multi_select", "radiobutton", "checkbox", "label"].include?(custom_field.cf_type)
NoMethodError:
undefined method `cf_type' for nil:NilClass
# ./app/models/custom_field_value.rb:13:in `option_field?'
# ./spec/models/custom_field_value_spec.rb:20:in `block (3 levels) in <top (required)>'
型号：CustomFieldValue
class CustomFieldValue < ApplicationRecord
belongs_to :custom_field
belongs_to :project
validates :custom_field, :project, presence: :true
validate :options_existence, if: :option_field?
validate :allowed_value_for_option_fields, if: -> cfv { cfv.option_field? && cfv.options_exist? }
# Conditions for validations
def option_field?
["single_select", "multi_select", "radiobutton", "checkbox", "label"].include?(custom_field.cf_type)
end
def options_exist?
!custom_field.custom_field_options.empty?
end
private
# Custom validations
# Validate that option fields have at least 1 option defined
def options_existence
if custom_field.custom_field_options.empty?
errors.add(:base, "No custom field option was found")
end
end
# Validation that only custom field option id can be stored for custom fields with options defined
def allowed_value_for_option_fields
if !custom_field.custom_field_options.map{|cfo| cfo.id.to_s}.include?(string_value)
errors.add(:base, "Custom field option id is the only accepted value")
end
end
型号：CustomField
class CustomField < ApplicationRecord
enum cf_type: { string: 10, text: 20, number: 30, single_select: 40,
multi_select: 50, checkbox: 60, radiobutton: 70, date: 80,
single_user: 90, multi_user: 100, label: 110 }
belongs_to :organization
has_many :custom_field_values, dependent: :destroy
has_many :custom_field_options, dependent: :destroy
accepts_nested_attributes_for :custom_field_options
validates :cf_type, :name, :organization, presence: :true
end
型号：项目
class Project < ApplicationRecord
belongs_to :organization
has_many :custom_field_values, dependent: :destroy
validates :name, :key, :organization, presence: :true
validates :key, uniqueness: { case_sensitive: false }, length: { minimum: 2, maximum: 25 }
# Validation of format
# Valid Input: abcd, xyz, aaa, aa-bb
# Invalid Input: abC, XYZ, 123, ABC123, -abc, abc-
validates_format_of :key, :with => /\A(?!-)[a-z][-\w]+(?<!-)\z/
accepts_nested_attributes_for :custom_field_values
end
RSpec：custom_field_value_spec.rb
require "rails_helper"
RSpec.describe CustomFieldValue, :type => :model do
subject {
create(:custom_field_value)
}
context "validations" do
it { should validate_presence_of :project }
it { should validate_presence_of :custom_field }
it { should belong_to(:project) }
it { should belong_to(:custom_field) }
it { expect { create(:custom_field_value, number_value: 1) }.to raise_error(ActiveRecord::RecordInvalid, /Value can be set only for one of the string_value, text_value, number_value or date_value/) }
it { expect { create(:custom_field_value_for_checkbox) }.to raise_error(ActiveRecord::RecordInvalid, /Custom field option id is the only accepted value/) }
end
end
工厂：custom_field_values.rb（factorybot）
FactoryBot.define do
factory :custom_field_value do
sequence(:string_value) { |n| "My String#{n}" }
association :project
association :custom_field, cf_type: :string
end
factory :custom_field_value_for_checkbox, class: CustomFieldValue do
sequence(:string_value) { |n| "My String#{n}" }
association :project
association :custom_field, factory: :custom_field_with_custom_field_options, cf_type: :checkbox
end
end
工厂：custom_fields.rb（factorybot）
FactoryBot.define do
factory :custom_field do
cf_type { :string }
sequence(:name) { |n| "Name#{n}" }
sequence(:description) { |n| "Description#{n}" }
association :organization
factory :custom_field_with_custom_field_values do
transient do
custom_field_values_count { 3 }
end
after(:create) do |custom_field, evaluator|
create_list(:custom_field_value, evaluator.custom_field_values_count, custom_field: custom_field)
end
end
factory :custom_field_with_custom_field_options do
transient do
custom_field_options_count { 3 }
end
after(:create) do |custom_field, evaluator|
create_list(:custom_field_option, evaluator.custom_field_options_count, custom_field: custom_field)
end
end
factory :custom_field_with_custom_field_values_and_options do
transient do
custom_field_values_and_options_count { 3 }
end
after(:create) do |custom_field, evaluator|
create_list(:custom_field_value, evaluator.custom_field_values_and_options_count, custom_field: custom_field)
create_list(:custom_field_option, evaluator.custom_field_values_and_options_count, custom_field: custom_field)
end
end
end
end
工厂：projects.rb（factorybot）
FactoryBot.define do
factory :project do
sequence(:name) { |n| "Name#{n}" }
sequence(:key) { |n| random_name }
association :organization
end
end
def random_name(length=5)
source = ('a'..'z').to_a.shuffle.join
name = ""
length.times{ name += source[rand(source.size)].to_s }
return name
end
答案 0 :(得分：1)
您可以对条件验证进行存根以通过测试：
RSpec.describe CustomFieldValue, :type => :model do
subject {
create(:custom_field_value)
}
context "validations" do
before { allow(subject).to receive(:option_field?).and_return(false) }
it { should validate_presence_of :custom_field }
end
end