Class | Hash |
In: |
lib/sequel/extensions/core_extensions.rb
lib/sequel/extensions/pg_hstore.rb lib/sequel/extensions/pg_json.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/extensions/core_extensions.rb, line 104 104: def &(ce) 105: ::Sequel::SQL::BooleanExpression.new(:AND, self, ce) 106: 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 on ruby 1.8, 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/extensions/core_extensions.rb, line 134 134: def case(*args) 135: ::Sequel::SQL::CaseExpression.new(to_a, *args) 136: end
Create a new HStore using the receiver as the input hash. Note that the HStore created will not use the receiver as the backing store, since it has to modify the hash. To get the new backing store, use:
hash.hstore.to_hash
# File lib/sequel/extensions/pg_hstore.rb, line 342 342: def hstore 343: Sequel::Postgres::HStore.new(self) 344: end
Return a Sequel::Postgres::JSONHash proxy to the receiver. This is mostly useful as a short cut for creating JSONHash objects that didn‘t come from the database.
# File lib/sequel/extensions/pg_json.rb, line 331 331: def pg_json 332: Sequel::Postgres::JSONHash.new(self) 333: end
Return a Sequel::Postgres::JSONHash proxy to the receiver. This is mostly useful as a short cut for creating JSONHash objects that didn‘t come from the database.
# File lib/sequel/extensions/pg_json.rb, line 338 338: def pg_jsonb 339: Sequel::Postgres::JSONBHash.new(self) 340: 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/extensions/core_extensions.rb, line 144 144: def sql_expr 145: ::Sequel::SQL::BooleanExpression.from_value_pairs(self) 146: 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/extensions/core_extensions.rb, line 153 153: def sql_negate 154: ::Sequel::SQL::BooleanExpression.from_value_pairs(self, :AND, true) 155: 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/extensions/core_extensions.rb, line 162 162: def sql_or 163: ::Sequel::SQL::BooleanExpression.from_value_pairs(self, :OR) 164: 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/extensions/core_extensions.rb, line 114 114: def |(ce) 115: ::Sequel::SQL::BooleanExpression.new(:OR, self, ce) 116: 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/extensions/core_extensions.rb, line 123 123: def ~ 124: ::Sequel::SQL::BooleanExpression.from_value_pairs(self, :OR, true) 125: end