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+
+Querying
+=================
+
+Documents can be retrieved through `find`, `findOne` and `findById`. These
+methods are executed on your `Model`s.
+
+## Model.find
+
+    Model.find(query, fields, options, callback)
+
+    // fields and options can be omitted
+
+### Simple query:
+
+    Model.find({ 'some.value': 5 }, function (err, docs) {
+      // docs is an array
+    });
+
+### Retrieving only certain fields
+
+    Model.find({}, ['first', 'last'], function (err, docs) {
+      // docs is an array of partially-`init`d documents
+      // defaults are still applied and will be "populated"
+    })
+
+## Model.findOne
+
+Same as `Model#find`, but only receives a single document as second parameter:
+
+    Model.findOne({ age: 5}, function (err, doc){
+      // doc is a Document
+    });
+
+## Model.findById
+
+Same as `findOne`, but receives a value to search a document by their `_id`
+key. This value is subject to casting, so it can be a hex string or a proper 
+ObjectId.
+
+    Model.findById(obj._id, function (err, doc){
+      // doc is a Document
+    });
+
+## Model.count
+
+Counts the number of documents matching `conditions`.
+
+    Model.count(conditions, callback);
+
+## Model.remove
+
+Removes documents matching `conditions`.
+
+    Model.remove(conditions, callback);
+
+## Model.distinct
+
+Finds distinct values of `field` for documents matching `conditions`.
+
+    Model.distinct(field, conditions, callback);
+
+## Model.where
+
+Creates a Query for this model.
+Handy when expressing complex directives.
+
+    Model
+    .where('age').gte(25)
+    .where('tags').in(['movie', 'music', 'art'])
+    .select('name', 'age', 'tags')
+    .skip(20)
+    .limit(10)
+    .asc('age')
+    .slaveOk()
+    .hint({ age: 1, name: 1 })
+    .run(callback);
+
+## Model.$where
+
+Sometimes you need to query for things in mongodb using a JavaScript
+expression. You can do so via find({$where: javascript}), or you can
+use the mongoose shortcut method $where via a Query chain or from
+your mongoose Model.
+
+    Model.$where('this.firstname === this.lastname').exec(callback)
+
+## Model.update
+
+Updates all documents matching `conditions` using the `update` clause. All
+`update` values are casted to their appropriate types before being sent.
+
+    var conditions = { name: 'borne' }
+      , update = { $inc: { visits: 1 }}
+      , options = { multi: true };
+
+    Model.update(conditions, update, options, callback)
+
+Note: for backwards compatibility, all top-level `update` keys that are
+not $atomic operation names are treated as `$set` operations. Example:
+
+    var query = { name: 'borne' };
+    Model.update(query, { name: 'jason borne' }, options, callback)
+
+    // is sent as
+
+    Model.update(query, { $set: { name: 'jason borne' }}, options, callback)
+
+## Query
+
+Each of these methods returns a [Query](https://github.com/LearnBoost/mongoose/blob/master/lib/query.js).
+If you don't pass a callback to these methods, the Query can be continued to be
+modified (such as adding options, fields, etc), before it's `exec`d.
+
+    var query = Model.find({});
+
+    query.where('field', 5);
+    query.limit(5);
+    query.skip(100);
+
+    query.exec(function (err, docs) {
+      // called when the `query.complete` or `query.error` are called
+      // internally
+    });