Class: SQLObject

Inherits:
Object
  • Object
show all
Defined in:
lib/sqlobject.rb

Overview

Main class for all objects. All other entities should inherit this class.

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ SQLObject

Do we really need a constructor here?



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# File 'lib/sqlobject.rb', line 12

def initialize
    @string = nil
    @alias  = nil
    @name   = nil
    @inline = nil
end

Instance Attribute Details

#alias ⇒ Object

Returns the value of attribute alias.



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# File 'lib/sqlobject.rb', line 7

def alias
  @alias
end

#inline ⇒ Object

Returns the value of attribute inline.



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# File 'lib/sqlobject.rb', line 7

def inline
  @inline
end

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/sqlobject.rb', line 7

def name
  @name
end

#separator ⇒ Object

Returns the value of attribute separator.



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# File 'lib/sqlobject.rb', line 7

def separator
  @separator
end

Class Method Details

.get(*list) ⇒ Object

Convert values to the corresponding internal data types



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# File 'lib/sqlobject.rb', line 52

def self.get ( *list )
    list.map! do |expr|
        if expr.is_a? SQLObject
             # inline queries go in parens:
            if expr.class == SQLConstructor || expr.is_a?( SQLConstructor::GenericQuery )
                expr.inline = true
            end
            expr
        elsif expr.is_a? Array or expr.is_a? Range
            SQLValList.new *expr.to_a
        elsif expr.is_a? Hash
            SQLAliasedList.new expr
        elsif expr.is_a? Symbol
            SQLColumn.new( expr )
        else
            SQLValue.new( expr )
        end
    end

     # Return array or scalar, depending on the number of function arguments
    list.length == 1  ?  list[0]  :  list
end

Instance Method Details

#_name(name) ⇒ Object

Set object’s name for further named processing



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# File 'lib/sqlobject.rb', line 22

def _name ( name )
    @name = name.to_s
    return self
end

#_string ⇒ Object

attr_reader for @string, actually an alias to to_s().



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# File 'lib/sqlobject.rb', line 38

def _string
    to_s
end

#_string=(val) ⇒ Object

attr_writer for @string



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# File 'lib/sqlobject.rb', line 45

def _string= ( val )
    @string = val
end

#to_s ⇒ Object

Store string representation in @string after the first call



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# File 'lib/sqlobject.rb', line 30

def to_s
    return @string  if @string
    @string = self.to_s
end