我正在学习Ruby on Rails并尝试开发一个应用程序.在我的应用我试图使用默认的开发模式SQLite数据库和PostgreSQL的在生产模式.但是在尝试使用以下命令安装pg gem时出现以下错误:gem install pg
Building native extensions. This could take a while...
ERROR: Error installing pg:
ERROR: Failed to build gem native extension.
/home/tusharkhatiwada/.rvm/rubies/ruby-2.0.0-p247/bin/ruby extconf.rb
checking for pg_config... yes
Using config values from /usr/bin/pg_config
You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev
for building a client-side application.
You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev
for building a client-side application.
checking for libpq-fe.h... no
Can't …这个问题有各种各样的变化,但是它们似乎都没有解决我问题的答案.
我正在运行OSX Lion(10.7.3).安装了最新的XCode.
我使用postgresapp.com的Postgres.app包安装了Postgres.
但是当我尝试安装pg gem时,我遇到了失败:
$ gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/MacOS/bin/pg_config
Building native extensions. This could take a while...
ERROR: Error installing pg:
ERROR: Failed to build gem native extension.
/Users/disaacs/.rvm/rubies/ruby-1.9.3-p125/bin/ruby extconf.rb --with-pg-config=/Applications/Postgres.app/Contents/MacOS/bin/pg_config
Using config values from /Applications/Postgres.app/Contents/MacOS/bin/pg_config
checking for libpq-fe.h... *** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers. Check the mkmf.log file for more
details. You may need configuration options.
Provided configuration options:
--with-opt-dir
--with-opt-include
--without-opt-include=${opt-dir}/include
--with-opt-lib …获得:
An error has occurred:
Error connecting to the server: fe_sendauth: no password supplied
设置database.yml与其他计算机上的应用程序设置相同.
如何设置以便我不需要硬编码的密码？
我可以使用PgAdmin-III查看db ok.
我宁愿没有密码,database.yml因为使用这个应用程序的其他机器没有/需要它,所以它似乎可能与我的Pg安装有关.
我的堆栈是node,express和pg模块.我真的试图通过文档和一些过时的教程来理解.我不知道何时以及如何断开连接并结束客户端.
对于某些路线,我决定使用游泳池.这是我的代码
const pool = new pg.Pool({
user: 'pooluser',host: 'localhost',database: 'mydb',password: 'pooluser',port: 5432});
pool.on('error', (err, client) => {
console.log('error ', err); process.exit(-1);
});
app.get('/', (req, res)=>{
pool.connect()
.then(client => {
return client.query('select ....')
.then(resolved => {
client.release();
console.log(resolved.rows);
})
.catch(e => {
client.release();
console.log('error', e);
})
pool.end();
})
});
在CMS的路由中,我使用客户端而不是具有与池不同的数据库权限的池.
const client = new pg.Client({
user: 'clientuser',host: 'localhost',database: 'mydb',password: 'clientuser',port: 5432});
client.connect();
const signup = (user) => {
return new Promise((resolved, rejeted)=>{
getUser(user.email)
.then(getUserRes => {
if (!getUserRes) { …在Ubuntu 10.04.3上升级到Ruby 1.9.3(使用系统RVM的1.9.2)后,我删除了所有的宝石,并尝试重新安装pg(ala bundle install pg).
然后它抛出一个错误并通知我,我应该看看mkmf.log,这两个都包含在这个要点中:https://gist.github.com/d05a81701d968895c730
libpq-dev,libpq5和postgresql-client都已安装并正常运行.在pg_config中指向gem,直接指向include和bin目录似乎没有任何改变.
我已经看到几个关于stackoverflow和网络其余部分的类似错误消息的问题,但它们似乎都很简单,缺少依赖性问题(大多数是通过安装libpq-dev解决的),所以我有点亏损
可能有用/相关的各种其他属性:
提前致谢.
gem_make.out:
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/usr/local/rvm/rubies/ruby-1.9.3-p0/bin/ruby extconf.rb
checking for pg_config... yes
Using config values from /usr/bin/pg_config
checking for libpq-fe.h... yes
checking for libpq/libpq-fs.h... yes
checking for PQconnectdb() in -lpq... no
checking for PQconnectdb() in -llibpq... no
checking for PQconnectdb() in -lms/libpq... no
Can't find the PostgreSQL client library (libpq)
*** extconf.rb failed ***
Could not create …更新到OS X 10.9 Mavericks后,我尝试启动Rails 3应用程序,但是与PG数据库的连接无法正常工作.检查PGAdmin III,数据库仍在那里,它工作正常.所以我尝试重新安装pg gem:
gem uninstall pg
gem install pg
但是最后一个命令没有成功,并给出以下错误:
构建原生扩展.这可能需要一段时间...错误:安装pg时出错:
错误:无法构建gem原生扩展.
Run Code Online (Sandbox Code Playgroud)/Users/XXX/.rvm/rubies/ruby-1.9.3-p194/bin/ruby extconf.rb checking for pg_config... yes Using config values from/ usr/local/bin/pg_config *extconf.rb失败*由于某些原因无法创建Makefile,可能缺少必要的库和/或头文件.检查mkmf.log文件以获取更多详细信息.您可能需要配置选项.
/Users/XXX/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:381:in`try_do':编译器无法生成可执行文件.
(RuntimeError)您必须首先安装开发工具.来自/Users/XXX/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:461:in
try_link0' from /Users/XXX/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:476:intry_link'来自extconf.rb:39:in''
我想这个问题与Xcode开发人员工具有关.我将Xcode更新到最新版本,但这并没有解决问题.你知道怎么解决吗？
抱歉打扰你,但我对这个错误有很多疑问.首先这是我的user_controller rspec文件
需要'spec/spec_helper'
describe UserController do
it "create new user" do
post "create"
assigns[:users].should_not be_new_record
end
end
这是我的UserController
class UserController < ApplicationController
def create
@users = User.new
if @users.save
flash[:notice] = 'new user was successfully created.'
else
render :action => :new
end
end
def new
@user = User.new
end
end
和我的routes.rb(我认为问题在这里,对不起,但我是这种语言的新手)
Estaciones::Application.routes.draw do
devise_for :users
root :to => "home#index"
resources :user
end
当我尝试测试我的user_controller_rspec然后我得到这个错误
失败:
1) UserController create new user
Failure/Error: post "create"
ActiveRecord::StatementInvalid:
PG::Error: ERROR: relation "users" does not exist …数据库noob警报:我试图插入postgres表.我想要插入的字段被调用make_date.
字段类型是timestamp without time zone NOT NULL,如何在此处插入今天的日期？就像现在的日期和时间？像下面的东西,但我无法获得dateTime.now正确的数据类型插入格式
insert into inventory_tbl (make_date) values (dateTime.now)
我正在向AWS Elastic Beanstalk部署一个简单的应用程序.然而,此刻我把gem 'pg'在Gemfile与这些推到弹性魔豆.我的日志中出现以下错误:
-------------------------------------
/var/log/eb-tools.log
-------------------------------------
Installing actionpack (4.0.1)
Installing mime-types (1.25)
Installing polyglot (0.3.3)
Installing treetop (1.4.15)
Installing mail (2.5.4)
Installing actionmailer (4.0.1)
Installing activemodel (4.0.1)
Installing activerecord-deprecated_finders (1.0.3)
Installing arel (4.0.1)
Installing activerecord (4.0.1)
Installing coffee-script-source (1.6.3)
Installing execjs (2.0.2)
Installing coffee-script (2.2.0)
Installing thor (0.18.1)
Installing railties (4.0.1)
Installing coffee-rails (4.0.1)
Installing hike (1.2.3)
Installing jbuilder (1.5.2)
Installing jquery-rails (3.0.4)
Using json (1.8.1)
Installing pg (0.17.0)
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem …ruby-on-rails amazon-web-services pg amazon-elastic-beanstalk
似乎有很多文档(例如https://devcenter.heroku.com/articles/heroku-postgresql#connecting-in-node-js,但也包括这个网站在其他地方),表明正确的方法与pg.js Node包正在使用pg.connect.但是,我尝试使用上述Heroku文档中显示的确切代码(在我之前的实际代码问题之后)进行测试:
var pg = require('pg');
pg.defaults.ssl = true;
pg.connect(process.env.DATABASE_URL, function(err, client) {
if (err) throw err;
console.log('Connected to postgres! Getting schemas...');
client
.query('SELECT table_schema,table_name FROM information_schema.tables;')
.on('row', function(row) {
console.log(JSON.stringify(row));
});
});
我收到错误消息"pg.connect不是一个函数".发生了什么,我该如何解决？