has_many 通过关联相关的错误仍然在 table 用户中引用
has_many through association dependent error is still referenced in table users
在我开始之前,我应该说我已经检查过 Rails 5.1.: destroy records in "has_many: through" association with restriction and has_many through association dependent destroy under condition of who called destroy 没有结果。
我的应用包含 has_one EMPRESA 的用户。
一个 EMPRESA 可能有多个 TAGS
一个 TAG 可能有多个 EMPRESAS(为此我使用了 has_many :through)
我的情况:出现此屏幕错误:
而且我知道这个错误的根源是因为我试图销毁带有未决引用的项目。但是我无法确定问题。
通过查看服务器控制台,我可以猜测问题涉及 empresa、标记和标记。
涉及机型
class Empresa < ApplicationRecord
skip_callback :validate, after: :create
after_initialize :set_default_plan, :if => :new_record?
attr_accessor :tag_list
enum plan: [:noplan, :basic, :plus, :premium]
belongs_to :user
belongs_to :category, optional: true
has_many :promos, dependent: :destroy
has_many :taggings, dependent: :destroy
has_many :tags, through: :taggings
mount_uploader :logo, LogoUploader
mount_uploaders :fotos, FotosUploader
def tag_list
tags.join(", ")
end
def tag_list=(names)
tag_names = names.split(",").collect {|str| str.strip.downcase}.uniq
new_or_existing_tags = tag_names.collect {|tag_name| Tag.find_or_create_by(name: tag_name)}
self.tags = new_or_existing_tags
end
def set_default_plan
self.plan ||= :noplan
end
end
class Tag < ApplicationRecord
has_many :empresas, through: :taggings
has_many :taggings, dependent: :destroy
def to_s
name
end
end
class Tagging < ApplicationRecord
belongs_to :empresa
belongs_to :tag
end
class Category < ApplicationRecord
validates :name, presence: true, length:{ minimum: 3 }, uniqueness: true
has_many :empresas, dependent: :nullify
end
class User < ApplicationRecord
enum role: [:user, :editor, :admin, :superadmin]
after_initialize :set_default_role, :if => :new_record?
has_one :empresa, dependent: :destroy
has_many :incidents, dependent: :destroy
has_many :comments, dependent: :destroy
# Include default devise modules. Others available are:
# :confirmable, :lockable, :timeoutable and :omniauthable
def set_default_role
self.role ||= :user
end
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
end
schema.rb(删除了不相关的表格)
ActiveRecord::Schema.define(version: 20180531033550) do
enable_extension "plpgsql"
create_table "empresas", force: :cascade do |t|
t.string "logo"
t.string "name"
t.text "description"
t.text "excerpt"
t.string "address"
t.string "web"
t.string "email"
t.string "tel"
t.string "video"
t.json "fotos"
t.integer "plan", default: 0
t.float "mlon"
t.float "mlat"
t.string "schedule0"
t.string "schedule1"
t.string "schedule2"
t.string "schedule3"
t.string "schedule4"
t.string "schedule5"
t.string "schedule6"
t.string "schedule7"
t.string "schedule8"
t.string "schedule9"
t.string "schedule10"
t.string "schedule11"
t.string "schedule12"
t.string "schedule13"
t.string "schedule14"
t.string "schedule15"
t.string "schedule16"
t.string "schedule17"
t.string "schedule18"
t.string "schedule19"
t.string "schedule20"
t.string "schedule21"
t.string "schedule22"
t.string "schedule23"
t.string "schedule24"
t.string "schedule25"
t.string "schedule26"
t.string "schedule27"
t.integer "tag_id"
t.integer "offer_id"
t.integer "user_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.integer "category_id"
t.index ["category_id"], name: "index_empresas_on_category_id", using: :btree
end
create_table "taggings", force: :cascade do |t|
t.integer "empresa_id"
t.integer "tag_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.index ["empresa_id"], name: "index_taggings_on_empresa_id", using: :btree
t.index ["tag_id"], name: "index_taggings_on_tag_id", using: :btree
end
create_table "tags", force: :cascade do |t|
t.string "name"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
create_table "users", force: :cascade do |t|
t.string "email", default: "", null: false
t.string "encrypted_password", default: "", null: false
t.string "reset_password_token"
t.datetime "reset_password_sent_at"
t.datetime "remember_created_at"
t.integer "sign_in_count", default: 0, null: false
t.datetime "current_sign_in_at"
t.datetime "last_sign_in_at"
t.string "current_sign_in_ip"
t.string "last_sign_in_ip"
t.integer "creditos", default: 0, null: false
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.integer "empresa_id"
t.integer "role"
t.string "first_name"
t.string "last_name"
t.date "birthdate"
t.string "dni"
t.string "phone"
t.string "address"
t.string "gender"
t.index ["email"], name: "index_users_on_email", unique: true, using: :btree
t.index ["empresa_id"], name: "index_users_on_empresa_id", using: :btree
t.index ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true, using: :btree
end
add_foreign_key "comments", "incidents"
add_foreign_key "comments", "users"
add_foreign_key "incidents", "users"
add_foreign_key "promos", "empresas"
add_foreign_key "taggings", "empresas"
add_foreign_key "taggings", "tags"
add_foreign_key "users", "empresas"
end
在 users
中不需要 empresa_id
。
通过以下方式删除引用完整性和列:
rails g migration remove_constraint_from_users
编辑新创建的迁移文件,在def change
块中添加以下内容
def change
remove_foreign_key :users, :empresas
remove_column :users, :empresa_id
end
在我开始之前,我应该说我已经检查过 Rails 5.1.: destroy records in "has_many: through" association with restriction and has_many through association dependent destroy under condition of who called destroy 没有结果。
我的应用包含 has_one EMPRESA 的用户。 一个 EMPRESA 可能有多个 TAGS 一个 TAG 可能有多个 EMPRESAS(为此我使用了 has_many :through)
我的情况:出现此屏幕错误:
而且我知道这个错误的根源是因为我试图销毁带有未决引用的项目。但是我无法确定问题。
通过查看服务器控制台,我可以猜测问题涉及 empresa、标记和标记。
涉及机型
class Empresa < ApplicationRecord
skip_callback :validate, after: :create
after_initialize :set_default_plan, :if => :new_record?
attr_accessor :tag_list
enum plan: [:noplan, :basic, :plus, :premium]
belongs_to :user
belongs_to :category, optional: true
has_many :promos, dependent: :destroy
has_many :taggings, dependent: :destroy
has_many :tags, through: :taggings
mount_uploader :logo, LogoUploader
mount_uploaders :fotos, FotosUploader
def tag_list
tags.join(", ")
end
def tag_list=(names)
tag_names = names.split(",").collect {|str| str.strip.downcase}.uniq
new_or_existing_tags = tag_names.collect {|tag_name| Tag.find_or_create_by(name: tag_name)}
self.tags = new_or_existing_tags
end
def set_default_plan
self.plan ||= :noplan
end
end
class Tag < ApplicationRecord
has_many :empresas, through: :taggings
has_many :taggings, dependent: :destroy
def to_s
name
end
end
class Tagging < ApplicationRecord
belongs_to :empresa
belongs_to :tag
end
class Category < ApplicationRecord
validates :name, presence: true, length:{ minimum: 3 }, uniqueness: true
has_many :empresas, dependent: :nullify
end
class User < ApplicationRecord
enum role: [:user, :editor, :admin, :superadmin]
after_initialize :set_default_role, :if => :new_record?
has_one :empresa, dependent: :destroy
has_many :incidents, dependent: :destroy
has_many :comments, dependent: :destroy
# Include default devise modules. Others available are:
# :confirmable, :lockable, :timeoutable and :omniauthable
def set_default_role
self.role ||= :user
end
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
end
schema.rb(删除了不相关的表格)
ActiveRecord::Schema.define(version: 20180531033550) do
enable_extension "plpgsql"
create_table "empresas", force: :cascade do |t|
t.string "logo"
t.string "name"
t.text "description"
t.text "excerpt"
t.string "address"
t.string "web"
t.string "email"
t.string "tel"
t.string "video"
t.json "fotos"
t.integer "plan", default: 0
t.float "mlon"
t.float "mlat"
t.string "schedule0"
t.string "schedule1"
t.string "schedule2"
t.string "schedule3"
t.string "schedule4"
t.string "schedule5"
t.string "schedule6"
t.string "schedule7"
t.string "schedule8"
t.string "schedule9"
t.string "schedule10"
t.string "schedule11"
t.string "schedule12"
t.string "schedule13"
t.string "schedule14"
t.string "schedule15"
t.string "schedule16"
t.string "schedule17"
t.string "schedule18"
t.string "schedule19"
t.string "schedule20"
t.string "schedule21"
t.string "schedule22"
t.string "schedule23"
t.string "schedule24"
t.string "schedule25"
t.string "schedule26"
t.string "schedule27"
t.integer "tag_id"
t.integer "offer_id"
t.integer "user_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.integer "category_id"
t.index ["category_id"], name: "index_empresas_on_category_id", using: :btree
end
create_table "taggings", force: :cascade do |t|
t.integer "empresa_id"
t.integer "tag_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.index ["empresa_id"], name: "index_taggings_on_empresa_id", using: :btree
t.index ["tag_id"], name: "index_taggings_on_tag_id", using: :btree
end
create_table "tags", force: :cascade do |t|
t.string "name"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
create_table "users", force: :cascade do |t|
t.string "email", default: "", null: false
t.string "encrypted_password", default: "", null: false
t.string "reset_password_token"
t.datetime "reset_password_sent_at"
t.datetime "remember_created_at"
t.integer "sign_in_count", default: 0, null: false
t.datetime "current_sign_in_at"
t.datetime "last_sign_in_at"
t.string "current_sign_in_ip"
t.string "last_sign_in_ip"
t.integer "creditos", default: 0, null: false
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.integer "empresa_id"
t.integer "role"
t.string "first_name"
t.string "last_name"
t.date "birthdate"
t.string "dni"
t.string "phone"
t.string "address"
t.string "gender"
t.index ["email"], name: "index_users_on_email", unique: true, using: :btree
t.index ["empresa_id"], name: "index_users_on_empresa_id", using: :btree
t.index ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true, using: :btree
end
add_foreign_key "comments", "incidents"
add_foreign_key "comments", "users"
add_foreign_key "incidents", "users"
add_foreign_key "promos", "empresas"
add_foreign_key "taggings", "empresas"
add_foreign_key "taggings", "tags"
add_foreign_key "users", "empresas"
end
在 users
中不需要 empresa_id
。
通过以下方式删除引用完整性和列:
rails g migration remove_constraint_from_users
编辑新创建的迁移文件,在def change
块中添加以下内容
def change
remove_foreign_key :users, :empresas
remove_column :users, :empresa_id
end