Model Error using Mongoose Pagination Package

Question

Model Error using Mongoose Pagination Package

I am trying to use the mongoose-pagination package and tried to follow the documentation provided, but it doesn't appear to be working with my model. I am getting this error message:

/Users/user/Desktop/Projects/node/blog/app/models/blogModel.js:16
BlogPostSchema.paginate({}, 2, 10, function(error, pageCount, paginatedResults
               ^
TypeError: Object #<Schema> has no method 'paginate'
    at Object.<anonymous> (/Users/user/Desktop/Projects/node/blog/app/models/blogModel.js:16:16)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Module.require (module.js:364:17)
    at require (module.js:380:17)
    at Object.<anonymous> (/Users/user/Desktop/Projects/node/blog/server.js:18:16)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)

And i'm not sure why I am receiving this error because the plugin is supposed to allow for the paginate method.

blogModel.js:

var mongoose    = require('mongoose');
var Schema      = mongoose.Schema;
var mongoosePaginate = require('mongoose-paginate');



var BlogPostSchema  = new Schema({
        title: String,
        author: String,
        content: String,
        date: { type: Date, default: Date.now }
});

BlogPostSchema.plugin(mongoosePaginate);

BlogPostSchema.paginate({}, 2, 10, function(error, pageCount, paginatedResults, itemCount) {
    if (error) {
        console.error(error);
    } else {
        console.log('Pages:', pageCount);
    }
});

module.exports = mongoose.model('Blogpost', BlogPostSchema);

node.js
mongodb
pagination
mongoose
mongoose-plugins

Answer 1

You are calling this wrong. The .paginate() method is instantiated on the model. So you set up the plugin on the schema and then make calls from your model instance. In simplified form:

var mongoose = require('mongoose'),
    mongoosePaginate = require('mongoose-paginate'),
    Schema = mongoose.Schema;


var blogPostSchema = new Schema({
  title: String,
  author: String,
  content: String,
  date: { type: Date, default: Date.now }
});

blogPostSchema.plugin( mongoosePaginate );

var Blogpost = mongoose.model( "Blogpost", blogPostSchema );

mongoose.connect('mongodb://localhost/test')

Blogpost.paginate({}, 2, 10, function(err,pageCount, results, count) {

  // do something with results

})