Gem::LoadError: Specified 'sqlite3' for database adapter, but the gem is not loaded

https://stackoverflow.com/questions/24755673/gemloaderror-specified-postgresql-for-database-adapter-but-the-gem-is-not Specified 'postgresql' for database adapter, but the gem is not loaded. 原文地址:https://www.cnblogs.com/ihibin/p/8215680.html

Setting up a database adapter zend-db provides a general purpose database abstraction layer. At its heart is the Adapter, which abstracts common database operations across the variety of drivers we support. In this guide, we will document how to conf

https://stackoverflow.com/questions/23287357/already-activated-rake-version-different-than-what-gemfile-requires-prevents-rak 原文地址:https://www.cnblogs.com/ihibin/p/8228963.html

http://stackoverflow.com/questions/5286117/incompatible-character-encodings-ascii-8bit-and-utf-8 http://stackoverflow.com/questions/22932282/gemloaderror-specified-mysql2-for-database-adapter-but-the-gem-is-not-loade 这个是因为在Gemfile和database.yml里写的都是my

今天用rails连接mysql后,rake db:create出现这个错误 Couldn't create database for {"adapter"=>"mysql2", "encoding"=>"utf8", "pool"=>5, "username"=>"root", "password"=>nil, &qu

Rails安装好 Rails 在ubuntu上安装rails(rvm ruby gem Bootstrap bootswatch) rails 4.1.4 ruby 2.2.0 sudo apt-get install mysql-server mysql-client 安装mysql(安装过程中设置mysql用户root密码) sudo apt-get install libmysqlclient-dev (https://github.com/brianmario/mysql2 看这段说明L

vim /opt/gitlab/embedded/service/gitlab-rails/.bundle/config将BUNDLE_WITHOUT: "development:test:mysql" 修改为BUNDLE_WITHOUT: "development:test:postgres" yum -y install ruby-devel cd /opt/gitlab/embedded/bin./gem install mysql2 1.创建数据库#创建数据

Sqlite3 的确很好用.小巧.速度快.最近研究它,有一些收获,这里把我对 sqlite3 的研究列出来,以备忘记. 导入SQLLite library并引入头文件. libsqlite3.dylib本身是个链接,在这里它指向libsqlite3.0.dylib.也就是说在这里你添加libsqlite3.dylib和添加libsqlite3.0.dylib其实是添加了同一个文件,没有区别,那为什么要添加libsqlite3.0.dylib呢?原因在于libsqlite3.dylib是旧版的sq

SQLite3是python的内置模块,是一款非常小巧的嵌入式开源数据库软件. 1. 导入Python SQLite数据库模块 import sqlite3 2. python sqlite3模块的API """ sqlite3.connect(database [,timeout ,other optional arguments]) 该 API 打开一个到 SQLite 数据库文件 database 的链接.您可以使用 ":memory:" 来在 RA