Class: Ronin::SQL::Clause

Inherits:
Struct
  • Object
show all
Includes:
Emittable, Fields, Functions, Literals, Statements
Defined in:
lib/ronin/sql/clause.rb

Overview

Represents a SQL Clause.

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Emittable

#emitter, #inspect, #to_s, #to_sql

Methods included from Statements

#delete, #drop_table, #insert, #select, #statement, #update

Methods included from Functions

#abs, #acos, #ascii, #asin, #atan, #atan2, #avg, #bin, #bit_and, #bit_count, #bit_length, #bit_or, #ceil, #ceiling, #char, #char_length, #character_length, #concat, #concat_ws, #conv, #cos, #cot, #count, #degrees, #elt, #exp, #export_set, #field, #find_in_set, #floor, #format, #glob, #greatest, #hex, #insert, #instr, #interval, #lcase, #least, #left, #length, #like, #load_file, #locate, #log, #log10, #lower, #lpad, #ltrim, #make_set, #max, #mid, #min, #mod, #oct, #octet_length, #ord, #pi, #position, #pow, #power, #quote, #radians, #rand, #random, #repeat, #replace, #reverse, #right, #round, #rpad, #rtrim, #sign, #sin, #soundex, #space, #sqrt, #std, #stddev, #strcmp, #substring, #substring_index, #sum, #tan, #trim, #truncate, #ucase, #unhex, #upper

Methods included from Fields

#method_missing, #respond_to_missing?, #to_ary

Methods included from Literals

#float, #int, #null, #string

Constructor Details

#initialize(keyword, argument = nil) {|(clause)| ... } ⇒ Clause

Initializes the SQL clause.

Parameters:

  • keyword (Symbol) —

    The name of the clause.

  • argument (Object) (defaults to: nil) —

    Additional argument for the clause.

Yields:

  • ((clause)) —

    If a block is given, the return value will be used as the argument.

Yield Parameters:

  • clause (Clause) —

    If the block accepts an argument, it will be passed the new clause. Otherwise the block will be evaluated within the clause.



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# File 'lib/ronin/sql/clause.rb', line 61

def initialize(keyword,argument=nil,&block)
  super(keyword,argument)

  if block
    self.argument = case block.arity
                    when 0 then instance_eval(&block)
                    else        block.call(self)
                    end
  end
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class Ronin::SQL::Fields

Instance Attribute Details

#argument ⇒ Object

Returns the value of attribute argument

Returns:

  • (Object) —

    the current value of argument



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# File 'lib/ronin/sql/clause.rb', line 37

def argument
  @argument
end

#keyword ⇒ Object

Returns the value of attribute keyword

Returns:

  • (Object) —

    the current value of keyword



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# File 'lib/ronin/sql/clause.rb', line 37

def keyword
  @keyword
end