flywheel.fields.conditions module¶

Query constraints

class flywheel.fields.conditions.Condition[source]¶

A constraint that will be applied to a query or scan

Attributes:	eq_fields : dict Mapping of field name to field value fields : dict Mapping of field name to (operator, value) tuples limit : int or `dynamo3.Limit` Maximum number of results scan_limit : int Maximum number of items to scan in DynamoDB index_name : str Name of index to use for a query

classmethod construct(field, op, other)[source]¶

Create a Condition on a field

Parameters:	field : str Name of the field to constrain op : str Operator, such as ‘eq’, ‘lt’, or ‘contains’ other : object The value to constrain the field with
Returns:	condition : `Condition`

classmethod construct_index(name)[source]¶

Force the query to use a certain index

Parameters:	name : str
Returns:	condition : `Condition`

classmethod construct_limit(count)[source]¶

Create a condition that will limit the results to a count

Parameters:	count : int
Returns:	condition : `Condition`

classmethod construct_scan_limit(count)[source]¶

Create a condition that will limit the number of items scanned

Parameters:	count : int
Returns:	condition : `Condition`