CODEWITHSUNDEEP
javascriptnode.jsexpressobjectmongoose
Yatin Gupta
Yatin Gupta

Reputation: 638

Creating objects in Model.js, NodeJs

In my model.js (using mongoose) , I am initially creating 40 objects in model.js which are to be used in the entire program. No other function in any file creates more objects but only updates the existing ones.

My model.js

var TicketSchema =  mongoose.model('Tickets', TicketSchema);

for(let i = 1;i<=40;i++)
{
    var new_ticket = new TicketSchema({ticket_number:i});
    new_ticket.save(function(err, ticket) {
   });
}

Problem is I noticed there were much more objects than 40 after some time. I wanted to know if model.js runs more than once during execution or is it just due to repeated calling of npm run start and then closing the server?

Also is there way better way of creating objects initially which are to be used for the entire program?

Upvotes: 1

Views: 301

Answers (1)

Darvesh
Darvesh

Reputation: 563

It will create new 40 documents every time you start the server. You can use this function to avoid creating if the records already exist by checking count.

const TicketModel =  mongoose.model('Tickets', TicketSchema);

const insertTicketNumber = async () => {
  try {
    const count = await TicketModel.countDocuments({});
    if (count) return;
    await TicketModel.create(
      [...Array(40).keys()]
        .map(i => i + 1)
        .map(number => ({ ticket_number: number }))
    );
  } catch (error) {
    console.log(error.message);
  }
};

Upvotes: 1

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