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我面對一個奇怪的行爲與ActiveRecord。首先這裏是我的數據庫模式：ActiveRecord奇怪的行爲「PG :: UndefinedColumn」與兩個users_id
，這裏是我的schema.rb文件：
ActiveRecord::Schema.define(version: 20160612080318) do
# These are extensions that must be enabled in order to support this database
enable_extension "plpgsql"
create_table "conversations", force: :cascade do |t|
t.integer "user1_id"
t.integer "user2_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
add_index "conversations", ["user1_id"], name: "index_conversations_on_user1_id", using: :btree
add_index "conversations", ["user2_id"], name: "index_conversations_on_user2_id", using: :btree
create_table "interests", force: :cascade do |t|
t.string "name"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
create_table "matches", force: :cascade do |t|
t.integer "user1_id"
t.integer "user2_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
add_index "matches", ["user1_id"], name: "index_matches_on_user1_id", using: :btree
add_index "matches", ["user2_id"], name: "index_matches_on_user2_id", using: :btree
create_table "messages", force: :cascade do |t|
t.text "content"
t.integer "conversation_id"
t.integer "user_id"
t.datetime "read_at"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
add_index "messages", ["conversation_id"], name: "index_messages_on_conversation_id", using: :btree
add_index "messages", ["user_id"], name: "index_messages_on_user_id", using: :btree
create_table "user_interests", force: :cascade do |t|
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.integer "user_id"
t.integer "interest_id"
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.inet "current_sign_in_ip"
t.inet "last_sign_in_ip"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.string "first_name"
t.string "last_name"
t.integer "age"
t.string "avatar_url"
end
add_index "users", ["email"], name: "index_users_on_email", unique: true, using: :btree
add_index "users", ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true, using: :btree
add_foreign_key "messages", "conversations"
add_foreign_key "messages", "users"
add_foreign_key "user_interests", "interests"
add_foreign_key "user_interests", "users"
end
爲了測試我的模型添加了這些行我seed.rb文件：
sarah = User.create!(email: "[email protected]", password: "azertyuiop", first_name: "sarah", avatar_url: "http://i.imgur.com/jOGeCVC.jpg")
alexandre = User.create!(email: "[email protected]", password: "azertyuiop", first_name: "Alexandre", avatar_url: "http://i.imgur.com/2jFvkJu.jpg")
happbot = User.create!(email: "[email protected]", password: "azertyuiop", first_name: "Happbot", avatar_url: "https://pbs.twimg.com/profile_images/659236694575616000/aF21-Wxz.jpg")
lisa = User.create!(email: "[email protected]", password: "azertyuiop", first_name: "Lisa", avatar_url: "https://ph-avatars.imgix.net/175314/original?auto=format&fit=crop&crop=faces&w=220&h=220")
c1 = Conversation.create!(user1: yoann, user2: sarah)
c2 = Conversation.create!(user1: yoann, user2: alexandre)
c3 = Conversation.create!(user1: yoann, user2: happbot)
c4 = Conversation.create!(user1: sarah, user2: alexandre)
c5 = Conversation.create!(user1: sarah, user2: happbot)
c6 = Conversation.create!(user1: alexandre, user2: happbot)
c7 = Conversation.create!(user1: yoann, user2: lisa)
m1 = Message.create!(user: yoann, conversation: c1, content: "Hey")
m2 = Message.create!(user: yoann, conversation: c2, content: "Hello")
m3 = Message.create!(user: yoann, conversation: c3, content: "What's up?")
m4 = Message.create!(user: sarah, conversation: c1, content: "Salut Yoann")
m5 = Message.create!(user: alexandre, conversation: c2, content: "Yo!")
m6 = Message.create!(user: happbot, conversation: c3, content: "Tu peux pas test")
m7 = Message.create!(user: sarah, conversation: c4, content: "Salut alexandre")
m8 = Message.create!(user: sarah, conversation: c5, content: "Salut Happbot")
m9 = Message.create!(user: alexandre, conversation: c6, content: "Hey!")
m10 = Message.create!(user: alexandre, conversation: c4, content: "Hello")
m11 = Message.create!(user: happbot, conversation: c5, content: "Quoi de neuf ?")
m12 = Message.create!(user: happbot, conversation: c6, content: "Tu fais quoi demain ?")
m12 = Message.create!(user: yoann, conversation: c7, content: "Yo!")
i1 = Interest.create!(name: "books")
i2 = Interest.create!(name: "music")
i3 = Interest.create!(name: "coffee")
UserInterest.create!(user: yoann, interest: i1)
UserInterest.create!(user: yoann, interest: i2)
UserInterest.create!(user: yoann, interest: i3)
Match.create!(user1: yoann, user2: lisa)
一切運行良好的第一個rake db:seed但如果我想添加一個匹配，並做另一個rake db:seed我碰到這個錯誤：
rake aborted!
ActiveRecord::StatementInvalid: PG::UndefinedColumn: ERROR: column matches.user_id does not exist
LINE 1: SELECT "matches".* FROM "matches" WHERE "matches"."user_id" ...
^
HINT: Perhaps you meant to reference the column "matches.user1_id" or the column "matches.user2_id".
: SELECT "matches".* FROM "matches" WHERE "matches"."user_id" = $1
/Users/yolo/code/happenstance-app/db/seeds.rb:1:in `<top (required)>'
-e:1:in `<main>'
PG::UndefinedColumn: ERROR: column matches.user_id does not exist
LINE 1: SELECT "matches".* FROM "matches" WHERE "matches"."user_id" ...
^
HINT: Perhaps you meant to reference the column "matches.user1_id" or the column "matches.user2_id".
/Users/yolo/code/happenstance-app/db/seeds.rb:1:in `<top (required)>'
-e:1:in `<main>'
Tasks: TOP => db:seed
(See full trace by running task with --trace)
這是我的user.rb文件：
class User < ActiveRecord::Base
# Include default devise modules. Others available are:
# :confirmable, :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
has_many :user_interests, dependent: :destroy
has_many :interests, through: :user_interests, dependent: :destroy
has_many :messages, dependent: :destroy
has_many :matches, dependent: :destroy
def conversations
Conversation.includes(:messages)
.where("user1_id = :id OR user2_id = :id", id: id)
.order("messages.created_at DESC")
end
def other_user(conversation)
conversation.users.include?(self) ? conversation.other_user(self) : nil
end
def unread_conversations
conversations.select { |c| c.unread_messages?(self) }
end
def unread_conversations_count
unread_conversations.count
end
def unread_conversations?
unread_conversations_count > 0
end
def one_avatar_url
avatar_url ? avatar_url : "http://placehold.it/64x64"
end
end
我match.rb文件：
class Match < ActiveRecord::Base
belongs_to :user1, class_name: "User"
belongs_to :user2, class_name: "User"
end
我檢查了很多答案，但我實在不明白這有什麼錯我的模式或我的模型。
非常感謝您的幫助！
非常感謝Arup！事實上，錯誤來自這個錯誤。我仍然需要學習很多東西。再次感謝您寶貴的幫助！ –
@YananLopez如果它幫助你，請將此答案標記爲已接受。 –