class Sequel::Postgres::JSONTableOp

  1. lib/sequel/extensions/pg_json_ops.rb
Superclass: Expression

Object representing json_table calls

Methods

Public Class

  1. new

Public Instance

  1. sequel_ast_transform
  2. to_s_append

Public Class methods

new(expr, path, opts=OPTS, &block)

See JSONBaseOp#table for documentation on the options.

[show source] 
     # File lib/sequel/extensions/pg_json_ops.rb
1208 def initialize(expr, path, opts=OPTS, &block)
1209   @expr = expr
1210   @path = path
1211   @passing = opts[:passing]
1212   @on_error = opts[:on_error]
1213   @columns = opts[:_columns] || ColumnDSL.columns(&block)
1214   freeze
1215 end

Public Instance methods

sequel_ast_transform(transformer)

Support transforming of json_table expression

[show source] 
     # File lib/sequel/extensions/pg_json_ops.rb
1244 def sequel_ast_transform(transformer)
1245   opts = {:on_error=>@on_error, :_columns=>@columns}
1246 
1247   if @passing
1248     passing = opts[:passing] = {}
1249     @passing.each do |k, v|
1250       passing[k] = transformer.call(v)
1251     end
1252   end
1253 
1254   self.class.new(transformer.call(@expr), @path, opts)
1255 end
to_s_append(ds, sql)

Append the json_table function call expression to the SQL

[show source] 
     # File lib/sequel/extensions/pg_json_ops.rb
1218 def to_s_append(ds, sql)
1219   sql << 'json_table('
1220   ds.literal_append(sql, @expr)
1221   sql << ', '
1222   default_literal_append(ds, sql, @path)
1223 
1224   if (passing = @passing) && !passing.empty?
1225     sql << ' PASSING '
1226     comma = false
1227     passing.each do |k, v|
1228       if comma
1229         sql << ', '
1230       else
1231         comma = true
1232       end
1233       ds.literal_append(sql, v)
1234       sql << " AS " << k.to_s
1235     end
1236   end
1237 
1238   to_s_append_columns(ds, sql, @columns)
1239   sql << TABLE_ON_ERROR_SQL.fetch(@on_error) if @on_error
1240   sql << ')'
1241 end