Question 117382 in Mongodb Question posted in
The official documentation can be found here.

How can I define a TTL index on a MongoDB schema using NestJs

I am currently using Nest’s SchemaFactory to setup my MongoDB models. Here is a link to their documentation:
https://docs.nestjs.com/techniques/mongodb#mongo

I was wondering how I could set a TTL index using this abstraction. I want every instance of a specific model to delete after 15 minutes.

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2

Answers


  1. 0

    The documentation that you linked has the following section:

    Alternatively, the @Prop() decorator accepts an options object argument (read more about the available options). With this, you can indicate whether a property is required or not, specify a default value, or mark it as immutable. For example:

    @Prop({ required: true })
name: string;

    Taking a look at the Mongoose docs, there is a special option for Date types, expires. This leads me to believe you could create a TTL index by including a Date field like so:

    @Prop({ expires: 900 }) // `expires` is in seconds
timestamp: Date;
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  2. 0 
    @Schema({})
export class Test {
  @Prop({ type: Date, expires: 900, default: Date.now })
  createdAt: Date;
}

    Or:

    @Schema({ timestamps: true })
export class Test {
  // ...
}

export const TestSchema = SchemaFactory.createForClass(Test);
TestSchema.index({ "createdAt": 1 }, { expireAfterSeconds: 900 });
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