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11f929b5c4
This is useful for dynamically created predicates e.g: expr1 = table.create_false expr2 = table.create_false expr1 = create_a_predicate() if some_condition expr2 = create_another_predicate() if some_other_condition table.where(expr1.and(expr2))
43 lines
796 B
Ruby
43 lines
796 B
Ruby
module Arel
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###
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# Methods for creating various nodes
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module FactoryMethods
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def create_true
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Arel::Nodes::True.new
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end
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def create_false
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Arel::Nodes::False.new
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end
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def create_table_alias relation, name
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Nodes::TableAlias.new(relation, name)
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end
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def create_join to, constraint = nil, klass = Nodes::InnerJoin
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klass.new(to, constraint)
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end
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def create_string_join to
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create_join to, nil, Nodes::StringJoin
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end
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def create_and clauses
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Nodes::And.new clauses
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end
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def create_on expr
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Nodes::On.new expr
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end
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def grouping expr
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Nodes::Grouping.new expr
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end
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###
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# Create a LOWER() function
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def lower column
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Nodes::NamedFunction.new 'LOWER', [column]
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end
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end
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end
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