我一直坚持这个错误几个小时,我无法弄清楚导致重复键错误的原因。
重复的密钥为null,我不知道这是指什么。这是错误:
{ MongoError: insertDocument :: caused by :: 11000 E11000 duplicate key error index: my_db.schools.$username_1 dup key: { : null }
我有学校模式:
var mongoose = require('mongoose');
var passportLocalMongoose = require('passport-local-mongoose');
var schoolSchema = new mongoose.Schema({
name: String,
location: String,
author: {
id: {
type: mongoose.Schema.Types.ObjectId,
ref: "User"
},
username: String
},
code: Number,
members: [
{
type: mongoose.Schema.Types.ObjectId,
ref: "User"
}
],
cluborgs: [
{
type: mongoose.Schema.Types.ObjectId,
ref: "Cluborg"
}
],
date_joined: {type: Date, default: Date.now}
});
schoolSchema.plugin(passportLocalMongoose);
module.exports = mongoose.model("School", schoolSchema);
与此Schema相关的一些路线:
var express = require('express');
var router = express.Router();
var School = require('../models/school');
var middleware = require('../middleware');
//index
router.get("/", function(req, res) {
School.find({}, function(err, allSchools) {
if (err) {
console.log(err);
} else {
res.render("schools/index", {schools: allSchools});
}
});
});
//new
router.get("/new", middleware.isLoggedIn, function(req, res) {
res.render("schools/new");
});
//create
router.post("/", middleware.isLoggedIn, function(req, res) {
var author = {
id: req.user._id,
username: req.user.username
};
var school = {
name: req.body.school.name,
location: req.body.school.location,
author: author,
code: req.body.school.code
};
School.create(school, function(err, newlyCreated) {
if (err) {
console.log(err);
} else {
req.flash("success", "Successfully created " + newlyCreated.name);
res.redirect("/schools");
}
});
});
//show
router.get("/:id", middleware.isLoggedIn, function(req, res) {
School.findById(req.params.id)
.populate("cluborgs")
.exec(function(err, foundSchool) {
if (err) {
console.log(err);
} else {
res.render("schools/show", {school: foundSchool});
}
});
});
//edit
router.get("/:id/edit", middleware.checkSchoolOwnership, function(req, res) {
School.findById(req.params.id, function(err, foundSchool) {
if (err) {
console.log(err);
} else {
res.render("schools/edit", {schools: foundSchool});
}
});
});
//update
router.put("/:id", middleware.checkSchoolOwnership, function(req, res) {
School.findByIdAndUpdate(req.params.id, req.body.school, function(err, updatedSchool) {
if (err) {
console.log(err);
} else {
req.flash("success", "Successfully updated school.");
res.redirect("/schools/" + req.params.id);
}
});
});
//destroy
router.delete("/:id", middleware.checkSchoolOwnership, function(req, res) {
School.findByIdAndRemove(req.params.id, function(err) {
if (err) {
res.redirect("/schools");
} else {
res.redirect("/schools");
}
});
});
module.exports = router; //put this in EVERY single one of your routes file to get rid of router errors
当我创建第二所学校时出现错误。 我做错了什么?
答案 0 :(得分:0)
从Mongoose属性中删除unique: true
并不会自动从MongoDB中删除索引。
此外,如果从Mongoose模式中完全删除属性,它也不会自动从MongoDB中删除相关索引。
所以看起来在你的情况下,MongoDB仍然期望你从模式中删除一个唯一的School.username值,因此默认为每个文档的空值 - 触发唯一约束。
我个人使用MongoDB CLI删除这些索引,但我怀疑该属性上的unique: false
设置也可以。