Ruby on rails
以下是开发mySQL
但是在Production PG上提出错误(部署到Heroku,postgreSQL),只有一些记录!
我有什么:
当我尝试触发下面的命令时,可以正常工作6次
Car.create(reg_no: "001", group_id: 1)
Car.create(reg_no: "002", group_id: 2)
...
但是
Car.create(reg_no: "007", group_id: 7)
和其他人最终:
PG::ForeignKeyViolation: ERROR: insert or update on table "cars" violates foreign key constraint "fk_rails_fa6b5abc5a"
DETAIL: Key (group_id)=(7) is not present in table "sizes".
因此不接受6之后的所有group_id。我不明白是什么让他们与众不同。
Group_id 7由Size:M和Grade:New组成,两者都出现在相应的表中。
irb(main):001:0>Group.find(7)
D, [2018-06-07T14:34:34.802158 #4] DEBUG -- : Group Load (1.3ms) SELECT "groups".* FROM "groups" WHERE "groups"."id" = $1 LIMIT $2 [["id", 7], ["LIMIT", 1]]
=> #<Group id: 7, size_id: 3, grade_id: 1, created_at: "2018-06-06 18:07:26", updated_at: "2018-06-06 18:07:26">
irb(main):002:0> Size.find(3)
D, [2018-06-07T14:35:59.133721 #4] DEBUG -- : Size Load (1.3ms) SELECT "sizes".* FROM "sizes" WHERE "sizes"."id" = $1 LIMIT $2 [["id", 3], ["LIMIT", 1]]
=> #<Size id: 3, name: "M", created_at: "2018-06-06 18:07:26", updated_at: "2018-06-06 18:07:26">
irb(main):004:0> Grade.find(1)
D, [2018-06-07T14:36:30.558192 #4] DEBUG -- : Grade Load (1.4ms) SELECT "grades".* FROM "grades" WHERE "grades"."id" = $1 LIMIT $2 [["id", 1], ["LIMIT", 1]]
=> #<Grade id: 1, name: "New", created_at: "2018-06-06 18:07:26", updated_at: "2018-06-06 18:07:26">
第6组的同一组请求不会引发错误
irb(main):005:0> Group.find(6)
D, [2018-06-07T15:00:27.431814 #4] DEBUG -- : Group Load (1.5ms) SELECT "groups".* FROM "groups" WHERE "groups"."id" = $1 LIMIT $2 [["id", 6], ["LIMIT", 1]]
=> #<Group id: 6, size_id: 2, grade_id: 3, created_at: "2018-06-06 18:07:26", updated_at: "2018-06-06 18:07:26">
irb(main):006:0> Size.find(2)
D, [2018-06-07T15:00:40.946858 #4] DEBUG -- : Size Load (1.4ms) SELECT "sizes".* FROM "sizes" WHERE "sizes"."id" = $1 LIMIT $2 [["id", 2], ["LIMIT", 1]]
=> #<Size id: 2, name: "SM", created_at: "2018-06-06 18:07:26", updated_at: "2018-06-06 18:07:26">
irb(main):007:0> Grade.find(3)
D, [2018-06-07T15:00:49.220472 #4] DEBUG -- : Grade Load (1.4ms) SELECT "grades".* FROM "grades" WHERE "grades"."id" = $1 LIMIT $2 [["id", 3], ["LIMIT", 1]]
=> #<Grade id: 3, name: "Old", created_at: "2018-06-06 18:07:26", updated_at: "2018-06-06 18:07:26">
模型
class Car < ApplicationRecord
belongs_to :group
validates :reg_no, presence: true, length: { maximum: 6 },
uniqueness: { case_sensitive: false }
end
class Group < ApplicationRecord
belongs_to :size
belongs_to :grade
has_many :cars, dependent: :destroy
validates :size_id, presence: true
validates :grade_id, presence: true
end
class Size < ApplicationRecord
has_many :groups, dependent: :destroy
has_many :grades, through: :groups
validates :name, uniqueness: true
end
class Grade < ApplicationRecord
has_many :groups, dependent: :destroy
has_many :sizes, through: :groups
end
SCHEMA
create_table "cars", force: :cascade do |t|
t.string "reg_no"
t.integer "group_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.index ["group_id"], name: "index_cars_on_group_id"
t.index ["reg_no"], name: "index_cars_on_reg_no", unique: true
end
create_table "groups", force: :cascade do |t|
t.integer "size_id"
t.integer "grade_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.index ["grade_id"], name: "index_groups_on_grade_id"
t.index ["size_id", "grade_id"], name: "index_groups_on_size_id_and_grade_id", unique: true
t.index ["size_id"], name: "index_groups_on_size_id"
end
create_table "sizes", force: :cascade do |t|
t.string "name"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
create_table "grades", force: :cascade do |t|
t.string "name"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
这是上次成功创建的服务器日志中的更多跟踪详细信息,首先是引发错误:
D, [2018-06-07T15:21:00.464588 #4] DEBUG -- : (1.8ms) COMMIT
D, [2018-06-07T15:21:00.466149 #4] DEBUG -- : Group Load (1.1ms) SELECT "groups".* FROM "groups" WHERE "groups"."size_id" = $1 AND "groups"."grade_id" = $2 LIMIT $3 [["size_id", 2], ["grade_id", 1], ["LIMIT", 1]]
D, [2018-06-07T15:21:00.467749 #4] DEBUG -- : (1.0ms) BEGIN
D, [2018-06-07T15:21:00.469748 #4] DEBUG -- : Group Load (1.1ms) SELECT "groups".* FROM "groups" WHERE "groups"."id" = $1 LIMIT $2 [["id", 4], ["LIMIT", 1]]
D, [2018-06-07T15:21:00.472005 #4] DEBUG -- : Car Exists (1.2ms) SELECT 1 AS one FROM "cars" WHERE LOWER("cars"."reg_no") = LOWER($1) LIMIT $2 [["reg_no", "ขก685"], ["LIMIT", 1]]
D, [2018-06-07T15:21:00.474472 #4] DEBUG -- : Car Create (1.4ms) INSERT INTO "cars" ("reg_no", "group_id", "created_at", "updated_at") VALUES ($1, $2, $3, $4) RETURNING "id" [["reg_no", "ขก685"], ["group_id", 4], ["created_at", "2018-06-07 15:21:00.472251"], ["updated_at", "2018-06-07 15:21:00.472251"]]
D, [2018-06-07T15:21:00.476690 #4] DEBUG -- : (1.8ms) COMMIT
D, [2018-06-07T15:21:00.478864 #4] DEBUG -- : Group Load (1.7ms) SELECT "groups".* FROM "groups" WHERE "groups"."size_id" = $1 AND "groups"."grade_id" = $2 LIMIT $3 [["size_id", 3], ["grade_id", 1], ["LIMIT", 1]]
D, [2018-06-07T15:21:00.480511 #4] DEBUG -- : (1.0ms) BEGIN
D, [2018-06-07T15:21:00.482638 #4] DEBUG -- : Group Load (1.2ms) SELECT "groups".* FROM "groups" WHERE "groups"."id" = $1 LIMIT $2 [["id", 7], ["LIMIT", 1]]
D, [2018-06-07T15:21:00.485111 #4] DEBUG -- : Car Exists (1.4ms) SELECT 1 AS one FROM "cars" WHERE LOWER("cars"."reg_no") = LOWER($1) LIMIT $2 [["reg_no", "ขก681"], ["LIMIT", 1]]
D, [2018-06-07T15:21:00.488164 #4] DEBUG -- : Car Create (1.9ms) INSERT INTO "cars" ("reg_no", "group_id", "created_at", "updated_at") VALUES ($1, $2, $3, $4) RETURNING "id" [["reg_no", "ขก681"], ["group_id", 7], ["created_at", "2018-06-07 15:21:00.485387"], ["updated_at", "2018-06-07 15:21:00.485387"]]
D, [2018-06-07T15:21:00.489452 #4] DEBUG -- : (1.1ms) ROLLBACK
rails aborted!
ActiveRecord::InvalidForeignKey: PG::ForeignKeyViolation: ERROR: insert or update on table "cars" violates foreign key constraint "fk_rails_fa6b5abc5a"
DETAIL: Key (group_id)=(7) is not present in table "sizes".
: INSERT INTO "cars" ("reg_no", "group_id", "created_at", "updated_at") VALUES ($1, $2, $3, $4) RETURNING "id"
/app/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/connection_adapters/postgresql_adapter.rb:603:in `async_exec'
...
答案 0 :(得分:0)
我在开发中切换到PG,因此它会产生相同的错误。
我找不到如何修复当前架构。可能是因为在开发期间我创建了表和列,然后更改了列和表的名称。即使最终架构看起来很好,但可能在某些阶段外键未正确更改。当我检查我的迁移时,对我的唯一怀疑是rename_column,即使这种方法也改变了相应的索引。
因此,我编写了具有所有必需详细信息的新迁移,甚至它生成的架构与此处列出的原始架构完全相同,但它有所帮助。
在搜索过程中找到有趣的迁移方法:
add_foreign_key
remove_foreign_key
但是id并没有帮助。
新生成的架构:
ActiveRecord::Schema.define(version: 2018_06_09_132438) do
create_table "cars", force: :cascade do |t|
t.string "reg_no"
t.integer "group_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.index ["group_id"], name: "index_cars_on_group_id"
t.index ["reg_no"], name: "index_cars_on_reg_no", unique: true
end
create_table "grades", force: :cascade do |t|
t.string "name"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
create_table "groups", force: :cascade do |t|
t.integer "size_id"
t.integer "grade_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.index ["grade_id"], name: "index_groups_on_grade_id"
t.index ["size_id", "grade_id"], name: "index_groups_on_size_id_and_grade_id", unique: true
t.index ["size_id"], name: "index_groups_on_size_id"
end
create_table "prices", force: :cascade do |t|
t.integer "group_id"
t.integer "season_id"
t.integer "amount"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.index ["group_id"], name: "index_prices_on_group_id"
t.index ["season_id"], name: "index_prices_on_season_id"
end
create_table "seasons", force: :cascade do |t|
t.string "name"
t.integer "start_day"
t.integer "start_month"
t.integer "end_day"
t.integer "end_month"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
create_table "sizes", 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 "name", default: "", null: false
t.string "email", default: "", null: false
t.integer "role", null: false
t.string "encrypted_password", default: "", null: false
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.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.index ["email"], name: "index_users_on_email", unique: true
end
end
答案 1 :(得分:0)
我们遇到了同样的问题。
您需要检查一下schema.rb并查看按钮。
您将看到使用foreign_key创建的迁移,您必须再次对其进行更新并运行迁移。