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_refinements.rb, line 100 100: def &(ce) 101: ::Sequel::SQL::BooleanExpression.new(:AND, self, ce) 102: end
Return a Sequel::SQL::CaseExpression with this hash as the conditions and the given default value.
{{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
# File lib/sequel/extensions/core_refinements.rb, line 128 128: def case(*args) 129: ::Sequel::SQL::CaseExpression.new(to_a, *args) 130: end
Return a Sequel::SQL::CaseExpression with this array as the conditions and the given default value and expression.
[[{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
# File lib/sequel/extensions/core_refinements.rb, line 31 31: def case(*args) 32: ::Sequel::SQL::CaseExpression.new(self, *args) 33: end
# File lib/sequel/extensions/pg_hstore.rb, line 326 326: def hstore 327: Sequel::Postgres::HStore.new(self) 328: end
Returns receiver wrapped in an Sequel::SQL::Identifier.
:ab.identifier # SQL: "a"
# File lib/sequel/extensions/core_refinements.rb, line 203 203: def identifier 204: Sequel::SQL::Identifier.new(self) 205: end
Converts a string into a Sequel::LiteralString, in order to override string literalization, e.g.:
DB[:items].where(abc: 'def') # "SELECT * FROM items WHERE (abc = 'def')" DB[:items].where(abc: 'def'.lit) # "SELECT * FROM items WHERE (abc = def)"
You can also provide arguments, to create a Sequel::SQL::PlaceholderLiteralString:
DB[:items].select{|o| o.count('DISTINCT ?'.lit(:a))} # "SELECT count(DISTINCT a) FROM items"
# File lib/sequel/extensions/core_refinements.rb, line 178 178: def lit(*args) 179: args.empty? ? Sequel::LiteralString.new(self) : Sequel::SQL::PlaceholderLiteralString.new(self, args) 180: end
# File lib/sequel/extensions/pg_array.rb, line 501 501: def pg_array(type=nil) 502: Sequel::Postgres::PGArray.new(self, type) 503: end
# File lib/sequel/extensions/pg_json.rb, line 338 338: def pg_json 339: Sequel::Postgres::JSONArray.new(self) 340: end
# File lib/sequel/extensions/pg_json.rb, line 348 348: def pg_json 349: Sequel::Postgres::JSONHash.new(self) 350: end
# File lib/sequel/extensions/pg_json.rb, line 342 342: def pg_jsonb 343: Sequel::Postgres::JSONBArray.new(self) 344: end
# File lib/sequel/extensions/pg_json.rb, line 352 352: def pg_jsonb 353: Sequel::Postgres::JSONBHash.new(self) 354: end
# File lib/sequel/extensions/pg_range.rb, line 543 543: def pg_range(db_type=nil) 544: Sequel::Postgres::PGRange.from_range(self, db_type) 545: end
# File lib/sequel/extensions/pg_row.rb, line 574 574: def pg_row 575: Sequel::Postgres::PGRow::ArrayRow.new(self) 576: 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_refinements.rb, line 138 138: def sql_expr 139: ::Sequel::SQL::BooleanExpression.from_value_pairs(self) 140: end
Return a Sequel::SQL::BooleanExpression created from this array, matching all of the conditions. Rarely do you need to call this explicitly, as Sequel generally assumes that arrays of two element arrays specify this type of condition. One case where it can be necessary to use this is if you are using the object as a value in a filter hash and want to use the = operator instead of the IN operator (which is used by default for arrays of two element arrays).
[[: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_refinements.rb, line 57 57: def sql_expr 58: Sequel[self] 59: end
Returns a Sequel::SQL::Function with this as the function name, and the given arguments.
:now.sql_function # SQL: now() :sum.sql_function(:a) # SQL: sum(a) :concat.sql_function(:a, :b) # SQL: concat(a, b)
# File lib/sequel/extensions/core_refinements.rb, line 213 213: def sql_function(*args) 214: Sequel::SQL::Function.new(self, *args) 215: end
Return a Sequel::SQL::BooleanExpression created from this array, 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_refinements.rb, line 66 66: def sql_negate 67: Sequel.negate(self) 68: 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_refinements.rb, line 147 147: def sql_negate 148: ::Sequel::SQL::BooleanExpression.from_value_pairs(self, :AND, true) 149: end
Return a Sequel::SQL::BooleanExpression created from this array, 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_refinements.rb, line 75 75: def sql_or 76: Sequel.or(self) 77: 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_refinements.rb, line 156 156: def sql_or 157: ::Sequel::SQL::BooleanExpression.from_value_pairs(self, :OR) 158: end
Return a Sequel::SQL::StringExpression representing an SQL string made up of the concatenation of this array‘s elements. If an argument is passed it is used in between each element of the array in the SQL concatenation.
[:a].sql_string_join # SQL: a [:a, :b].sql_string_join # SQL: (a || b) [:a, 'b'].sql_string_join # SQL: (a || 'b') ['a', :b].sql_string_join(' ') # SQL: ('a' || ' ' || b)
# File lib/sequel/extensions/core_refinements.rb, line 88 88: def sql_string_join(joiner=nil) 89: Sequel.join(self, joiner) 90: end
Return a Sequel::SQL::ValueList created from this array. Used if this array contains all two element arrays and you want it treated as an SQL value list (IN predicate) instead of as a conditions specifier (similar to a hash). This is not necessary if you are using this array as a value in a filter, but may be necessary if you are using it as a value with placeholder SQL:
DB[:a].where([:a, :b]=>[[1, 2], [3, 4]]) # SQL: ((a, b) IN ((1, 2), (3, 4))) DB[:a].where('(a, b) IN ?', [[1, 2], [3, 4]]) # SQL: ((a, b) IN ((1 = 2) AND (3 = 4))) DB[:a].where('(a, b) IN ?', [[1, 2], [3, 4]].sql_value_list) # SQL: ((a, b) IN ((1, 2), (3, 4)))
# File lib/sequel/extensions/core_refinements.rb, line 44 44: def sql_value_list 45: ::Sequel::SQL::ValueList.new(self) 46: end
Returns a Sequel::SQL::Blob that holds the same data as this string. Blobs provide proper escaping of binary data.
# File lib/sequel/extensions/core_refinements.rb, line 184 184: def to_sequel_blob 185: ::Sequel::SQL::Blob.new(self) 186: 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_refinements.rb, line 110 110: def |(ce) 111: ::Sequel::SQL::BooleanExpression.new(:OR, self, ce) 112: end
Return a Sequel::SQL::BooleanExpression created from this array, 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_refinements.rb, line 22 22: def ~ 23: Sequel.~(self) 24: 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_refinements.rb, line 119 119: def ~ 120: ::Sequel::SQL::BooleanExpression.from_value_pairs(self, :OR, true) 121: end