为什么ActiveRecord :: StatementInvalid：SQLite3 :: SQLException：在“）”附近：语法错误：INSERT INTO“ user_friendships” （）个值（）

问题描述

为什么要选择ActiveRecord :: StatementInvalid：SQLite3 :: SQLException：附近）：语法错误：INSERT INTO user_friendships（）VALUES（）

Why Why ActiveRecord::StatementInvalid: SQLite3::SQLException: near ")": syntax error: INSERT INTO "user_friendships" () VALUES ()

尝试时测试：

$ ruby​​-我测试test / unit / user_friendships_test.rb

$ ruby -I test test/unit/user_friendships_test.rb

require 'test_helper'

class UserFriendshipsTest < ActiveSupport::TestCase
should belong_to (:user)
should belong_to (:friend)

test "that creating a frinedship works without raising an exception" do

    assert_nothing_raised do
        UserFriendship.create user: users(:a), friend: friends(:b)
    end

end

end

有什么想法吗？

更新：他的是Schema.rb

UPDATE: his is part of the Schema.rb

create_table "user_friendships", :force => true do |t|
 t.integer  "user_id"
 t.integer  "friend_id"
 t.datetime "created_at", :null => false
 t.datetime "updated_at", :null => false
end

add_index "user_friendships", ["user_id", "friend_id"], :name => "index_user_friendships_on_user_id_and_friend_id"

create_table "users", :force => true do |t|
 t.string   "first_name"
 t.string   "last_name"
 t.string   "profile_name"
 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.datetime "created_at",                             :null => false
 t.datetime "updated_at",                             :null => false
end

add_index "users", ["email"], :name => "index_users_on_email", :unique => true
add_index "users", ["reset_password_token"], :name => "index_users_on_reset_password_token", :unique => true

end

推荐答案

I也碰到了这个它似乎与搞乱rails命名约定有关。就我而言，执行 rails g model activity_item而不是 rails g model activity_items即可解决此问题。

I ran into this as well. It seems to be related to screwing up the rails naming conventions. In my case, doing "rails g model activity_item" instead of "rails g model activity_items" solved the issue.

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