Pass a hardcoded value through mongoose schema - node.js

Question

I would like to post some hard coded values along with user input(variables) every time.
args: [{ type: mongoose.Schema.Types.Mixed, required: true }] >>in this array i would like to pass some hard coded values along with user input variables.
Well my data to be posted looks like this.
{"file": "**<user input>**","name":"<user input>", "className": "com.izac.Parser.IO", "args": ["-i", "{\"enrichedKafkaOptions\": {\"checkpointLocation\": \"**<hard coded path always remains the same>**", \"kafka.bootstrap.servers\": \"localhost:9092\", \"topic\": \"demoEnriched\"}, \"rejectedKafkaOptions\": {\"checkpointLocation\": \"/Users/vipulrajan/Desktop/checkpoints/DemoRejected\", \"kafka.bootstrap.servers\": \"localhost:9092\", \"topic\": \"demoRejected\"} }","-s", "{\"master\":\"local[*]\", \"appName\":\"app1\", \"config\":{\"jvm.memory\":\"4g\"} }"]};
This is my schema,
const mongoose = require('mongoose');
const livy_schema = mongoose.Schema({
file: { type: String, required: true },
name: { type: String, required: true },
className: { type: String, required: true },
args: [{ type: mongoose.Schema.Types.Mixed, required: true }] //here i have constants to pass on to
});
const kafka_schema = mongoose.Schema({
_id: mongoose.Schema.Types.ObjectId,
name: { type: String, required: true, unique: false },
config: { type: mongoose.Schema.Types.Mixed, required: true } //here i have constants to pass on to
});
const enrichedEventSchema = mongoose.Schema({
_id: mongoose.Schema.Types.ObjectId,
projectId: { type: mongoose.Schema.Types.ObjectId, ref: 'Project', required: true },
name: { type: String, required: true, unique: true },
description: { type: String, required: false },
type: { type: String, enum: ["Enriched"], required: true },
format: { type: String, enum: ["JSON", "DELIMITED", "FixedWidth", "LOG"], required: true },
kafka: [kafka_schema],
livy: [livy_schema]
});
Original question Asynchronous Programming in node js to pass constants/predefined mandatory values through mongoose model .
I'm kind of in dilemma, like should i pass this hardcodeded values in router.post() method(if its possible, how should i code?) or in schema? please guide me in right direction.

Answer 1

Please excuse me if I am misunderstanding the question.
Since you are using mongoose schema you can have your field default be a function where you can initialize and add hardcoded values.
Something like this:
const livy_schema = mongoose.Schema({
file: {
type: String,
required: true
},
name: {
type: String,
required: true
},
className: {
type: String,
required: true
},
args: [{
type: mongoose.Schema.Types.Mixed,
required: true,
default: function() {
return { data: 'hardcoded!', info: 'hardcoded!' }
}
}] //here i have constants to pass on to
});
)
if the schema is in the right context I assume you can easily replace those strings with values being passed or swap the default function.