dql.expressions.base module

Common utilities for all expressions

class dql.expressions.base.Expression

Bases: object

Base class for all expressions and expression fragments

build(self, visitor)

Build string expression, using the visitor to encode values

class dql.expressions.base.Field(field)

Bases: dql.expressions.base.Expression

Wrapper for a field in an expression

build(self, visitor)

Build string expression, using the visitor to encode values

evaluate(self, item)

Pull the field off the item

class dql.expressions.base.Value(val)

Bases: dql.expressions.base.Expression

Wrapper for a value in an expression

build(self, visitor)

Build string expression, using the visitor to encode values

evaluate(self, item)

Values evaluate to themselves regardless of the item