Package ganeti :: Module query :: Class Query

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Class Query

Instance Methods

__init__(self, fieldlist, selected)
Initializes this class.

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frozenset

RequestedData(self)
Gets requested kinds of data.

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List of objects.QueryFieldDefinition

GetFields(self)
Returns the list of fields for this query.

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Query(self, ctx)
Execute a query.

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OldStyleQuery(self, ctx)
Query with "old" query result format.

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Method Details

init(self, fieldlist, selected)
(Constructor)

Initializes this class.

The field definition is a dictionary with the field's name as a key and a tuple containing, in order, the field definition object (objects.QueryFieldDefinition, the data kind to help calling code collect data and a retrieval function. The retrieval function is called with two parameters, in order, the data container and the item in container (see Query.Query).

Users of this class can call RequestedData before preparing the data container to determine what data is needed.

Parameters:

fieldlist (dictionary) - Field definitions
selected (list of strings) - List of selected fields

GetFields(self)

Returns the list of fields for this query.

Includes unknown fields.

Returns: List of objects.QueryFieldDefinition

Query(self, ctx)

Execute a query.

Parameters:

ctx - Data container passed to field retrieval functions, must support iteration using __iter__

OldStyleQuery(self, ctx)

Query with "old" query result format.

See Query.Query for arguments.