class Sequel::Postgres::PGArray
Represents a PostgreSQL array column value.
Attributes
array_type[RW]
The type of this array. May be nil if no type was given. If a type is provided, the array is automatically casted to this type when literalizing. This type is the underlying type, not the array type itself, so for an int4[] database type, it should be :int4 or 'int4'
Public Class Methods
new(array, type=nil)
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Set the array to delegate to, and a database type.
Calls superclass method
# File lib/sequel/extensions/pg_array.rb 430 def initialize(array, type=nil) 431 super(array) 432 @array_type = type 433 end
Public Instance Methods
op()
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sql_literal_append(ds, sql)
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Append the array SQL
to the given sql string. If the receiver has a type, add a cast to the database array type.
# File lib/sequel/extensions/pg_array.rb 438 def sql_literal_append(ds, sql) 439 at = array_type 440 if empty? && at 441 sql << "'{}'" 442 else 443 sql << "ARRAY" 444 _literal_append(sql, ds, to_a) 445 end 446 if at 447 sql << '::' << at.to_s << '[]' 448 end 449 end
Private Instance Methods
_literal_append(sql, ds, array)
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Recursive method that handles multi-dimensional arrays, surrounding each with [] and interspersing entries with ,.
# File lib/sequel/extensions/pg_array.rb 456 def _literal_append(sql, ds, array) 457 sql << '[' 458 comma = false 459 commas = ',' 460 array.each do |i| 461 sql << commas if comma 462 if i.is_a?(Array) 463 _literal_append(sql, ds, i) 464 else 465 ds.literal_append(sql, i) 466 end 467 comma = true 468 end 469 sql << ']' 470 end