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Save to MongoDB without Duplicates Using Mongoose
Posted by @bravocoder #javascript #nodejs
Step 0: Compile a Model
var mongoose = require('mongoose');
var Schema = mongoose.Schema;
const exampleSchema = new Schema({
title: { type: String , required: true},
content: [{type: String}]
});
var Example = mongoose.model('Example', exampleSchema);
module.exports = Example;
content_copyCopy to Clipboard
Step 1: In your router, use the following
router.post('/example', (req, res, next) => {
var query = req.body.title; //Extract title from input form
Example.findOne({title:query}, function(err, example){
if(err) console.log(err);
if ( example){
console.log("This has already been saved");
} else {
var example = new Example(req.body);
example.save(function(err, example) {
if(err) console.log(err);
console.log("New example created");
res.redirect(`/`);
});
}
});
});
content_copyCopy to Clipboard
More details:
This method helps you prevent creating duplicates in your database. It works by first searching the database. If there are no search results, it will create and save a new item.