title: Show all posts created from specific year
body: <p>I created all the links to send a number with the specified year that the user wants to see. Now all I want to set the routes use that year and display the posts created that year. Basically the number that will go to the routes is for example 2001. What do I need to add here?</p>
  
  <p>Routes</p>
  
  <pre><code>var keystone = require('keystone');
  var async = require('async');
  
  exports = module.exports = function(req, res) {
  
      var view = new keystone.View(req, res);
      var locals = res.locals;
      // This gets category spesified on link
      // and then use it to show
      // post from that category
      var val = req.url;
      var gc = val.substr(val.indexOf("&amp;") + 1);
  
      // This gets Year spesified on link
      // and then use it to show
      // post from that year
      var gy = req.url;
      gy = gy.replace(/\D/g, '');
      gy = gy.substring(0, 4);
  
      // Init locals
      locals.section = 'exam_per_year';
      locals.filters = {
          category: req.params.category,
      };
      locals.data = {
          posts: [],
          categories: [],
      };
      // Load the posts
      view.on('init', function(next) {
          var c = keystone.list('PostCategory').model.findOne().where('key').equals(gc).exec(function(err, results) {
              if (err) {
                  console.log(err);
              } else {
                  var gcid = results._id;
                  var q = keystone.list('Post').paginate({
                      page: req.query.page || 1,
                      perPage: 20,
                      maxPages: 100,
                  }).where('state', 'published').where('categories').equals(gcid);
                  q.exec(function(err, results) {
                      if (results &amp;&amp; !err) {
                          locals.data.posts  = results.Array.map(function(curResult) {
                              return curResult.getFullYear() === gy; // Your year goes here
                          });
                          return next();
                      }
                  // else { // You either have no posts or there was an error loading them}
                  });
                  // q.exec(function(err, results) {
                  //  locals.data.posts = results;
                  //  next(err);
                  // });
              }
          });
      });
      // Render the view
      view.render('exam_per_year');
  };
  </code></pre>
  
  <p><strong><em>This is the model</em></strong></p>
  
  <pre><code>var keystone = require('keystone');
  var Types = keystone.Field.Types;
  
  /**
   * Post Model
   * ==========
   */
  
  var Post = new keystone.List('Post', {
      map: { name: 'title' },
      autokey: { path: 'slug', from: 'title', unique: true },
  });
  
  Post.add({
      title: { type: String, required: true },
      categories: { type: Types.Relationship, ref: 'PostCategory', many: true },
      state: { type: Types.Select, options: 'draft, published, archived', default: 'published', index: true },
      publishedDate: { type: Types.Date, index: true, dependsOn: { state: 'published' } },
      image: { type: Types.CloudinaryImage },
      pronunciations: { type: Types.CloudinaryImage },
      answers: { type: Types.CloudinaryImage },
      content: {
          extended: { type: Types.Html, wysiwyg: true, height: 300 },
      },
  
  });
  
  Post.schema.virtual('content.full').get(function () {
      return this.content.extended || this.content.brief;
  });
  
  Post.defaultColumns = 'title, state|20%, author|20%, publishedDate|20%';
  Post.register();
  </code></pre>
  
  <p>i already have the year on routes but i don't know how to use where correctly
  so far .where('publishedDate').equals('2001')it shows nothing
  heres a post in mongodb database from 1-1-2001</p>
  
  <pre><code>{"_id": ObjectID("5857b9387cf9b55946a5cae3"),
  "slug": "test-exam-2001",
  "title": "Test Exam 2001",
  "state": "published",
  "categories": [
      ObjectID("5857b80a7cf9b55946a5cadf")
  ],
  "__v": 2,
  "content": {
      "extended": "&lt;p&gt;empty&lt;/p&gt;"
  },
  "publishedDate": ISODate("2000-12-31T22:00:00.000Z")}
  </code></pre>