问题描述
我是 node.js 的新手(才几天),正在通过 youtube 上的教程学习(不知道是否允许发布链接)。
我正在尝试在 couchDB 中创建一个数据库。一切正常,但只要我尝试在表单上输入任何详细信息,它就会显示异常“创建数据库地址时出错”(地址是我尝试创建的数据库的名称)
我非常仔细地遵循了教程,并且一直在寻找解决方案一段时间,但最终一无所获。
如果你发现了什么,请帮忙。
App.js:
var express = require('express');
var routes = require('./routes');
var http = require('http');
var path = require('path');
var urlencoded = require('url');
var bodyParser = require('body-parser');
var json = require('json');
var logger = require('logger');
var methodoverride = require('method-override');
var nano = require('nano')('http://admin:password@localhost:5984');
var db = nano.use('address');
var app = express();
app.set('port',process.env.PORT || 3000);
app.set('views',path.join(__dirname,'views'));
app.set('view engine','jade');
app.use(bodyParser.json());
// app.use(bodyParser.urlencoded());
app.use(bodyParser.urlencoded({
extended: true
}));
app.use(methodoverride());
app.use(express.static(path.join(__dirname,'public')));
app.get('/',routes.index);
app.post('/createdb',function(req,res) {
nano.db.create(req.body.dbname,function(err){
if(err) {
res.send("Error creating Database " + req.body.dbname);
return;
}
res.send("Database " + req.body.dbname + "created successfully");
});
});
app.post('/new_contact',res) {
var name = req.body.name;
var phone = req.body.phone;
db.insert({name : name,phone : phone,crazy : true},phone,function(err,body,header) {
if(err) {
res.send("Error creating contact");
return;
}
res.send("Contact created successfully");
});
});
app.post('/view_contact',res) {
var alldoc = "Following are the contacts";
db.get(req.body.phone,{revs_info : true},body) {
if(!err) {
console.log(body);
}
if(body) {
alldoc += "Name: " + body.name + "<br/>Phone Number: " + body.phone;
}
else {
alldoc = "No records found";
}
res.send(alldoc);
});
});
app.post('/delete_contact',res) {
db.get(req.body.phone,body) {
if(!err) {
db.destroy(req.body.phone,body._rev,body) {
if(err) {
res.send("error deleting contact");
}
});
res.send("Contacts deleted successfullly");
}
});
});
http.createServer(app).listen(app.get('port'),function() {
console.log('Express server listening on port: ' + app.get('port'));
});
index.js
exports.index = function(req,res) {
res.render('index',{title: 'express'});
};
createdb.js
exports.create = function(req,function() {
if(err) {
res.send("Error creating the Database");
return;
}
res.send("database created successfully");
});
};
index.js 和 createdb.js 都在路由文件夹中
index.jade
extend layout
block content
h1 Add new Contact
form(method="POST",action = '/new_contact')
p name:
input#title(type = "text",name = "name")
p Phone No.:
input#title(type = "text",name = "phone")
p: button(type = "submit") Add new Contact
h1 Add new Database
form(method = "POST",action= "/createdb")
p Database name:
input#title(type = "text",name = "dbname")
p: button(type="submit") Add new Database
h1 enter Phone number to delete new_contact
form(method = "POST",action= "/delete_contact")
p Phone No.:
input#title(type = "text",name = "phone")
p: button(type="submit") Delete Contact
h1 View Specific contact
form(method = "POST",action= "/view_contact")
p Phone No.:
input#title(type = "text",name = "phone")
p: button(type="submit") Search Contact
layout.jade
doctype html
html
head
title = title
//- link(rel='stylesheet',href='/stylesheet/style.css')
body
block content
layout.jade 和 index.jade 存在于视图文件夹中
package.json
{
"name": "sample","version": "1.0.0","description": "just a sample.","main": "app.js","scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},"author": "","license": "ISC","dependencies": {
"body-parser": "^1.19.0","errorhandler": "^1.5.1","express": "^4.17.1","express-session": "^1.17.1","jade": "^1.11.0","json": "^10.0.0","logger": "0.0.1","method-override": "^3.0.0","nano": "^9.0.3","pug": "^3.0.2","serve-favicon": "^2.5.0","url": "^0.11.0"
}
}
解决方法
简单浏览一下代码,您似乎没有将任何身份验证详细信息传递给 nano:
var nano = require('nano')('http://localhost:5984');
var db = nano.use('address');
/* ... */
app.post('/createdb',function(req,res) {
nano.db.create(req.body.dbname,function(err){
这可能适用于以管理员组模式运行的旧版本 CouchDB,从 CouchDB 3.0 开始不再支持该模式。
在本地安装 CouchDB 时,您需要在开始之前设置管理员用户和密码。
使用 nano 时,您需要提供以下凭据:
var nano = require('nano')('http://admin:password@localhost:5984')