Class | Hash |
In: |
lib/sequel/extensions/pg_json.rb
lib/sequel/extensions/pg_hstore.rb lib/sequel/extensions/core_extensions.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 106 106: def &(ce) 107: ::Sequel::SQL::BooleanExpression.new(:AND, self, ce) 108: 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 136 136: def case(*args) 137: ::Sequel::SQL::CaseExpression.new(to_a, *args) 138: 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 329 329: def pg_json 330: Sequel::Postgres::JSONHash.new(self) 331: 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 336 336: def pg_jsonb 337: Sequel::Postgres::JSONBHash.new(self) 338: 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 146 146: def sql_expr 147: ::Sequel::SQL::BooleanExpression.from_value_pairs(self) 148: 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 155 155: def sql_negate 156: ::Sequel::SQL::BooleanExpression.from_value_pairs(self, :AND, true) 157: 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 164 164: def sql_or 165: ::Sequel::SQL::BooleanExpression.from_value_pairs(self, :OR) 166: 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 116 116: def |(ce) 117: ::Sequel::SQL::BooleanExpression.new(:OR, self, ce) 118: 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 125 125: def ~ 126: ::Sequel::SQL::BooleanExpression.from_value_pairs(self, :OR, true) 127: end