Class: SQLTree::Node::Expression::Value

Inherits:
Object
  • Object
show all
Defined in:
lib/active_record/turntable/sql_tree_patch.rb

Direct Known Subclasses

EscapedValue

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.parse(tokens) ⇒ Object 



281
282
283
284
285
286
287
288
289
290
291
292
293
294
 
# File 'lib/active_record/turntable/sql_tree_patch.rb', line 281

def self.parse(tokens)
  case tokens.next
  when SQLTree::Token::String, SQLTree::Token::Number
    SQLTree::Node::Expression::Value.new(tokens.current.literal)
  when SQLTree::Token::NULL
    SQLTree::Node::Expression::Value.new(nil)
  when SQLTree::Token::TRUE
    SQLTree::Node::Expression::Value.new(true)
  when SQLTree::Token::FALSE
    SQLTree::Node::Expression::Value.new(false)
  else
    raise SQLTree::Parser::UnexpectedToken.new(tokens.current, :literal)
  end
end

Instance Method Details

#to_sql(options = {}) ⇒ Object 



268
269
270
271
272
273
274
275
276
277
278
279
 
# File 'lib/active_record/turntable/sql_tree_patch.rb', line 268

def to_sql(options = {})
  case value
  when nil;            'NULL'
  when true;           'TRUE'
  when false;          'FALSE'
  when String;         quote_str(@value)
  when Numeric;        @value.to_s
  when Date;           @value.strftime("'%Y-%m-%d'")
  when DateTime, Time; @value.strftime("'%Y-%m-%d %H:%M:%S'")
  else raise "Don't know how te represent this value in SQL!"
  end
end