CODEWITHSUNDEEP
node.jsdatabasemongodbexpressmongoose
AndrewLeonardi
AndrewLeonardi

Reputation: 3512

Seed MongoDB Data - Only Once?

I'm a bit new to the concept of seeding.

My goal is to have a set of data in the database that can be shown on the front end. I don't want to "Seed" the database each time I start the server. I simply want to add one set of data. I've figured out how to seed the database but only if I seed it each time I start the server. Am I going about this correctly? How do I only seed it once? Thanks! I run the seedfoods() function in app.js when the server starts. 

var mongoose = require("mongoose");
var Food = require("./models/food");

function seedfoods() { 
//add the foods to the database
data.forEach(function(seedfoods){
Food.create(seedfoods, function(err, Food){
if(err){
console.log(err)
} else {
console.log("added a food");
}
});
});

}

var data = [
{ 
name: "Avocados",
easyFood: true,
phase1: true,
about: "Yum Avocados",
},

{ 
name: "Milk",
easyFood: true,
phase1: true,
about: "Yum Milk",
},
]

module.exports = seedfoods;

Upvotes: 1

Views: 1490

Answers (1)

BenSower
BenSower

Reputation: 1612

A couple of options:

Have an initial script on the start of the server which runs the seed once and stores some sort of record of doing so (e.g. a db entry or a file or something similiar). This is probably the cleanest, but also the one with the biggest effort.

What I suggest you do is this: You can skip the detection of existing documents by simply using the upsert option in an update query, which will only create a new document, if it doesn't exist already. So just run your seed on every start with an update operation with the option {upsert: true}.

https://mongoosejs.com/docs/api.html#model_Model.findOneAndUpdate

Upvotes: 2

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