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field_predicates.rb
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field_predicates.rb
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require 'sql/type_predicates'
module Sql
module FieldPredicates
include TypePredicates
def inspect
to_s
end
def type
field.type
end
def bind_ordered_column!
self.field.bind_ordered_column!
end
def resolve(new_field_name)
clone = self.dup
clone.field = self.field.resolve(new_field_name)
clone
end
def display_format
field && field.display_format
end
def name
field.name
end
def table
field.table
end
def table=(new_table)
field.table = new_table
end
def qualified?
field.qualified?
end
def prefixed?
field.prefixed?
end
def has_prefix?(prefix)
field.has_prefix?(prefix)
end
def reference?
field.reference?
end
def context
Sql::QueryContext.context
end
def value(x)
self.column && self.column.value(x)
end
def value_key?
field.value_key? if field
end
def sort?
field.sort?
end
def max?
field.max?
end
def each_field(&block)
field.each_field(&block) if self.field
end
def unique_valued?
field.unique_valued?
end
def local?
field.local?
end
def summarisable?
field.summarisable?
end
def column
field.column
end
def known?
value_key? || column
end
def === (thing)
@field === thing
end
end
end