updated docs
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@@ -29,9 +29,9 @@ Retrieving objects with filters
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That can be accomplished with the QuerySet's ``.filter(\*\*)`` method.
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For example, given the model definition:
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.. code-block:: python
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class Automobile(Model):
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manufacturer = columns.Text(primary_key=True)
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year = columns.Integer(primary_key=True)
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@@ -40,11 +40,17 @@ Retrieving objects with filters
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...and assuming the Automobile table contains a record of every car model manufactured in the last 20 years or so, we can retrieve only the cars made by a single manufacturer like this:
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.. code-block:: python
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q = Automobile.objects.filter(manufacturer='Tesla')
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You can also use the more convenient syntax:
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.. code-block:: python
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q = Automobile.objects(Automobile.manufacturer == 'Tesla')
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We can then further filter our query with another call to **.filter**
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.. code-block:: python
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@@ -123,6 +129,7 @@ Filtering Operators
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q = Automobile.objects.filter(manufacturer='Tesla')
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q = q.filter(year__in=[2011, 2012])
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:attr:`> (__gt) <query.QueryOperator.GreaterThanOperator>`
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.. code-block:: python
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@@ -130,6 +137,10 @@ Filtering Operators
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q = Automobile.objects.filter(manufacturer='Tesla')
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q = q.filter(year__gt=2010) # year > 2010
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# or the nicer syntax
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q.filter(Automobile.year > 2010)
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:attr:`>= (__gte) <query.QueryOperator.GreaterThanOrEqualOperator>`
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.. code-block:: python
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@@ -137,6 +148,10 @@ Filtering Operators
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q = Automobile.objects.filter(manufacturer='Tesla')
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q = q.filter(year__gte=2010) # year >= 2010
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# or the nicer syntax
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Automobile.objects.filter(Automobile.manufacturer == 'Tesla')
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:attr:`< (__lt) <query.QueryOperator.LessThanOperator>`
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.. code-block:: python
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@@ -144,6 +159,10 @@ Filtering Operators
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q = Automobile.objects.filter(manufacturer='Tesla')
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q = q.filter(year__lt=2012) # year < 2012
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# or...
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q.filter(Automobile.year < 2012)
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:attr:`<= (__lte) <query.QueryOperator.LessThanOrEqualOperator>`
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.. code-block:: python
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@@ -151,6 +170,8 @@ Filtering Operators
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q = Automobile.objects.filter(manufacturer='Tesla')
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q = q.filter(year__lte=2012) # year <= 2012
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q.filter(Automobile.year <= 2012)
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TimeUUID Functions
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==================
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@@ -220,7 +241,7 @@ Ordering QuerySets
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Since Cassandra is essentially a distributed hash table on steroids, the order you get records back in will not be particularly predictable.
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However, you can set a column to order on with the ``.order_by(column_name)`` method.
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However, you can set a column to order on with the ``.order_by(column_name)`` method.
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*Example*
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@@ -245,12 +266,12 @@ Values Lists
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Batch Queries
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===============
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cqlengine now supports batch queries using the BatchQuery class. Batch queries can be started and stopped manually, or within a context manager. To add queries to the batch object, you just need to precede the create/save/delete call with a call to batch, and pass in the batch object.
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cqlengine now supports batch queries using the BatchQuery class. Batch queries can be started and stopped manually, or within a context manager. To add queries to the batch object, you just need to precede the create/save/delete call with a call to batch, and pass in the batch object.
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You can only create, update, and delete rows with a batch query, attempting to read rows out of the database with a batch query will fail.
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.. code-block:: python
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from cqlengine import BatchQuery
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#using a context manager
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@@ -298,7 +319,7 @@ QuerySet method reference
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.. method:: limit(num)
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Limits the number of results returned by Cassandra.
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*Note that CQL's default limit is 10,000, so all queries without a limit set explicitly will have an implicit limit of 10,000*
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.. method:: order_by(field_name)
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@@ -306,7 +327,7 @@ QuerySet method reference
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:param field_name: the name of the field to order on. *Note: the field_name must be a clustering key*
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:type field_name: string
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Sets the field to order on.
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Sets the field to order on.
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.. method:: allow_filtering()
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