| Class | Hash |
| In: |
lib/sequel/core_sql.rb
|
| Parent: | Object |
Return a Sequel::SQL::BooleanExpression created from this hash, matching all of the conditions in this hash and the condition specified by the given argument.
{:a=>1} & :b # SQL: a = 1 AND b
{:a=>true} & ~:b # SQL: a IS TRUE AND NOT b
# File lib/sequel/core_sql.rb, line 111
111: def &(ce)
112: ::Sequel::SQL::BooleanExpression.new(:AND, self, ce)
113: end
Return a Sequel::SQL::CaseExpression with this hash as the conditions and the given default value. Note that the order of the conditions will be arbitrary, so all conditions should be orthogonal.
{{:a=>[2,3]}=>1}.case(0) # SQL: CASE WHEN a IN (2, 3) THEN 1 ELSE 0 END
{:a=>1, {:b=>2}].case(:d, :c) # SQL: CASE c WHEN a THEN 1 WHEN b THEN 2 ELSE d END
# or: CASE c WHEN b THEN 2 WHEN a THEN 1 ELSE d END
# File lib/sequel/core_sql.rb, line 141
141: def case(default, expression = nil)
142: ::Sequel::SQL::CaseExpression.new(to_a, default, expression)
143: end
Return a Sequel::SQL::BooleanExpression created from this hash, matching all of the conditions. Rarely do you need to call this explicitly, as Sequel generally assumes that hashes specify this type of condition.
{:a=>true}.sql_expr # SQL: a IS TRUE
{:a=>1, :b=>[2, 3]}.sql_expr # SQL: a = 1 AND b IN (2, 3)
# File lib/sequel/core_sql.rb, line 151
151: def sql_expr
152: ::Sequel::SQL::BooleanExpression.from_value_pairs(self)
153: end
Return a Sequel::SQL::BooleanExpression created from this hash, matching none of the conditions.
{:a=>true}.sql_negate # SQL: a IS NOT TRUE
{:a=>1, :b=>[2, 3]}.sql_negate # SQL: a != 1 AND b NOT IN (2, 3)
# File lib/sequel/core_sql.rb, line 160
160: def sql_negate
161: ::Sequel::SQL::BooleanExpression.from_value_pairs(self, :AND, true)
162: end
Return a Sequel::SQL::BooleanExpression created from this hash, matching any of the conditions.
{:a=>true}.sql_or # SQL: a IS TRUE
{:a=>1, :b=>[2, 3]}.sql_or # SQL: a = 1 OR b IN (2, 3)
# File lib/sequel/core_sql.rb, line 169
169: def sql_or
170: ::Sequel::SQL::BooleanExpression.from_value_pairs(self, :OR)
171: end
Return a Sequel::SQL::BooleanExpression created from this hash, matching all of the conditions in this hash or the condition specified by the given argument.
{:a=>1} | :b # SQL: a = 1 OR b
{:a=>true} | ~:b # SQL: a IS TRUE OR NOT b
# File lib/sequel/core_sql.rb, line 121
121: def |(ce)
122: ::Sequel::SQL::BooleanExpression.new(:OR, self, ce)
123: end
Return a Sequel::SQL::BooleanExpression created from this hash, not matching all of the conditions.
~{:a=>true} # SQL: a IS NOT TRUE
~{:a=>1, :b=>[2, 3]} # SQL: a != 1 OR b NOT IN (2, 3)
# File lib/sequel/core_sql.rb, line 130
130: def ~
131: ::Sequel::SQL::BooleanExpression.from_value_pairs(self, :OR, true)
132: end