33 lines
783 B
JavaScript
33 lines
783 B
JavaScript
const mongoose = require('mongoose');
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const Schema = mongoose.Schema;
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const CounterSchema = Schema({
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_id: { type: String, required: true },
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seq: { type: Number, default: 1000 }
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});
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const counter = mongoose.model('counter', CounterSchema);
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// create a schema for our links
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const urlSchema = new Schema({
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_id: { type: Number, index: true },
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long_url: String,
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created_at: Date,
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visits: { type: Number, default: 0 }
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});
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urlSchema.pre('save', function(next) {
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const doc = this;
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counter.findByIdAndUpdate({ _id: 'url_count' }, { $inc: { seq: 1 } }, function(error, counter) {
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if (error)
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return next(error);
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doc.created_at = new Date();
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doc._id = counter.seq;
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next();
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});
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});
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const Url = mongoose.model('Url', urlSchema);
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module.exports = Url;
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