0
這一個沒有使用谷歌搜索，所以我別無選擇，只能用這樣的braincracker打擾你。Rails，formtastic和postgres：NotNullViolation
我有2個模型，通過HMT鏈接。 我也有ActiveAdmin。 當我嘗試從第一個模型創建對象時，postgres發射NotNullViolation，因爲，rails會嘗試進行連接，而不會實際在連接表中插入已創建對象的ID。
像這樣：
SQL (0.9ms) INSERT INTO "project_stone_joins" ("stone_id") VALUES ($1) [["stone_id",2]]
PG::NotNullViolation: ERROR: null value in column "project_id" violates not-null constraint
DETAIL: Failing row contains (null, 2).: INSERT INTO "project_stone_joins" ("stone_id") VALUES ($1)
(0.4ms) ROLLBACK
尖尖的事情是：改變做就好了。沒有笑話，siree，它做得很好。
(0.3ms) BEGIN
SQL (0.7ms) DELETE FROM "project_stone_joins" WHERE "project_stone_joins"."project_id" = $1 AND "project_stone_joins"."stone_id" = 4 [["project_id", 10]]
SQL (0.3ms) INSERT INTO "project_stone_joins" ("project_id", "stone_id") VALUES ($1, $2) [["project_id", 10], ["stone_id", 2]]
SQL (0.3ms) INSERT INTO "project_stone_joins" ("project_id", "stone_id") VALUES ($1, $2) [["project_id", 10], ["stone_id", 3]]
SQL (0.3ms) INSERT INTO "project_stone_joins" ("project_id", "stone_id") VALUES ($1, $2) [["project_id", 10], ["stone_id", 16]]
SQL (0.3ms) INSERT INTO "project_stone_joins" ("project_id", "stone_id") VALUES ($1, $2) [["project_id", 10], ["stone_id", 17]]
SQL (0.3ms) INSERT INTO "project_stone_joins" ("project_id", "stone_id") VALUES ($1, $2) [["project_id", 10], ["stone_id", 28]]
SQL (0.4ms) INSERT INTO "project_stone_joins" ("project_id", "stone_id") VALUES ($1, $2) [["project_id", 10], ["stone_id", 30]]
SQL (0.5ms) INSERT INTO "project_stone_joins" ("project_id", "stone_id") VALUES ($1, $2) [["project_id", 10], ["stone_id", 42]]
(33.5ms) COMMIT
所以，實際上導軌忘了把我的project_id在project_stone_joins。 或者我過度勞累，沒有看到重要的事情。 這裏的模型，模式，等等。
SCHEMA.RB------------------------
create_table "stones", force: true do |t|
t.integer "stone_material_id"
t.string "name"
t.string "cover_file_name"
t.string "cover_content_type"
t.integer "cover_file_size"
t.datetime "cover_updated_at"
t.boolean "render"
end
create_table "projects", force: true do |t|
t.string "name"
t.integer "project_group_id"
t.text "description"
t.string "cover_file_name"
t.string "cover_content_type"
t.integer "cover_file_size"
t.datetime "cover_updated_at"
t.boolean "ours"
end
create_table "project_stone_joins", id: false, force: true do |t|
t.integer "project_id", null: false
t.integer "stone_id", null: false
end
PROJECT.RB-MODELS--------------------
class Project < ActiveRecord::Base
belongs_to :project_group
has_many :project_photos
has_many :project_stone_joins, dependent: :destroy
has_many :stones, through: :project_stone_joins
has_attached_file :cover,
styles: {thumb: '100x100#', medium:'300x300#'},
default_url: 'project_covers/:style/missing.png'
validates_attachment_content_type :cover,
content_type: /\Aimage\/.*\Z/
accepts_nested_attributes_for :project_stone_joins
end
PROJECT.RB-ADMIN------------------
ActiveAdmin.register Project do
permit_params :name, :project_group_id, :description,
:cover, :ours, stone_ids:[]
form do |f|
f.inputs do
f.input :project_group
f.input :stones
f.input :name
f.input :description
f.input :cover, as: :file
f.input :ours
end
f.actions
end
end
STONE.RB-MODELS---------------------------
class Stone < ActiveRecord::Base
belongs_to :stone_material
has_many :stone_photos
has_many :project_stone_joins, dependent: :destroy
has_many :projects, through: :project_stone_joins
has_many :varieties
has_attached_file :cover,
styles: {thumb: '100x100#', medium:'300x300#'},
default_url: 'stone_covers/:style/missing.png'
validates_attachment_content_type :cover,
content_type: /\Aimage\/.*\Z/
accepts_nested_attributes_for :project_stone_joins
end
STONE.RB-ADMIN------------------------------
ActiveAdmin.register Stone do
permit_params :name, :stone_material_id, :cover, :render, project_ids: []
form do |f|
f.inputs do
f.input :stone_material
f.input :name
f.input :cover, as: :file
f.input :render
end
f.actions
end
end
PROJECT_STONE_JOIN.RB-MODEL------------------
class ProjectStoneJoin < ActiveRecord::Base
belongs_to :project
belongs_to :stone
end
那麼，怎麼了？行動不受限制，但創建不起作用和更新。