Class: Knj::Db_row

Inherits:
Object show all
Defined in:
lib/knj/knjdb/libknjdb_row.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(args) ⇒ Db_row

Returns a new instance of Db_row.



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# File 'lib/knj/knjdb/libknjdb_row.rb', line 6

def initialize(args)
  @args = {}
  args.each do |key, value|
    @args[key.to_sym] = value
  end
  
  @args[:db] = $db if !@args[:db] and $db and $db.class.to_s == "Knj::Db"
  @args[:objects] = $objects if !@args[:objects] and $objects and $objects.is_a?(Knj::Objects)
  @args[:col_id] = :id if !@args[:col_id]
  raise "No table given." if !@args[:table]
  
  if @args[:data] and (@args[:data].is_a?(Integer) or @args[:data].is_a?(Fixnum) or @args[:data].is_a?(String))
    @data = {@args[:col_id].to_sym => @args[:data].to_s}
    self.reload
  elsif @args[:data] and @args[:data].is_a?(Hash)
    @data = {}
    @args[:data].each do |key, value|
      @data[key.to_sym] = value
    end
  elsif @args[:id]
    @data = {}
    @data[@args[:col_id].to_sym] = @args[:id]
    self.reload
  else
    raise ArgumentError.new("Invalid data: #{@args[:data].to_s} (#{@args[:data].class.to_s})")
  end
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(*args) ⇒ Object 



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# File 'lib/knj/knjdb/libknjdb_row.rb', line 141

def method_missing(*args)
  func_name = args[0].to_s
  if match = func_name.match(/^(\S+)\?$/) and @data.key?(match[1].to_sym)
    if @data[match[1].to_sym] == "1" or @data[match[1].to_sym] == "yes"
      return true
    elsif @data[match[1].to_sym] == "0" or @data[match[1].to_sym] == "no"
      return false
    end
  end
  
  raise sprintf("No such method: %s", func_name)
end

Instance Attribute Details

#args ⇒ Object (readonly)

Returns the value of attribute args.



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# File 'lib/knj/knjdb/libknjdb_row.rb', line 2

def args
  @args
end

#data ⇒ Object (readonly)

Returns the value of attribute data.



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# File 'lib/knj/knjdb/libknjdb_row.rb', line 2

def data
  @data
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/knj/knjdb/libknjdb_row.rb', line 89

def [](key)
  raise "No valid key given." if !key
  raise "No data was loaded on the object? Maybe you are trying to call a deleted object?" if !@data
  
  if @data.key?(key)
    return @data[key]
  elsif @data.key?(key.to_sym)
    return @data[key.to_sym]
  elsif @data.key?(key.to_s)
    return @data[key.to_s]
  end
  
  raise "No such key: #{key.to_s}."
end

#[]=(key, value) ⇒ Object 



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# File 'lib/knj/knjdb/libknjdb_row.rb', line 104

def []=(key, value)
  self.update(key.to_sym => value)
  self.reload
end

#db ⇒ Object 



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# File 'lib/knj/knjdb/libknjdb_row.rb', line 34

def db
  if !@args[:force_selfdb]
    curthread = Thread.current
    if curthread.is_a?(Knj::Thread) and curthread[:knjappserver] and curthread[:knjappserver][:db]
      return curthread[:knjappserver][:db]
    end
  end
  
  return @args[:db]
end

#delete ⇒ Object 



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# File 'lib/knj/knjdb/libknjdb_row.rb', line 75

def delete
  self.db.delete(@args[:table], {@args[:col_id] => self.id})
  self.destroy
end

#destroy ⇒ Object 



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# File 'lib/knj/knjdb/libknjdb_row.rb', line 80

def destroy
  @args = nil
  @data = nil
end

#each(&args) ⇒ Object 



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# File 'lib/knj/knjdb/libknjdb_row.rb', line 129

def each(&args)
  return @data.each(&args)
end

#esc(str) ⇒ Object 



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# File 'lib/knj/knjdb/libknjdb_row.rb', line 137

def esc(str)
  return self.db.escape(str)
end

#has_key?(key) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/knj/knjdb/libknjdb_row.rb', line 85

def has_key?(key)
  return @data.key?(key.to_sym)
end

#id ⇒ Object 



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# File 'lib/knj/knjdb/libknjdb_row.rb', line 109

def id
  return @data[@args[:col_id]]
end

#is_knj? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/knj/knjdb/libknjdb_row.rb', line 4

def is_knj?; return true; end

#ob ⇒ Object Also known as: objects 



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# File 'lib/knj/knjdb/libknjdb_row.rb', line 45

def ob
  return @args[:objects] if @args.key?(:objects)
  return $ob if $ob and $ob.is_a?(Knj::Objects)
  return false
end

#reload ⇒ Object 



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# File 'lib/knj/knjdb/libknjdb_row.rb', line 53

def reload
  last_id = self.id
  data = self.db.single(@args[:table], {@args[:col_id] => self.id})
  if !data
    raise Errno::ENOENT.new("Could not find any data for the object with ID: '#{last_id}' in the table '#{@args[:table].to_s}'.")
  end
  
  @data = {}
  data.each do |key, value|
    @data[key.to_sym] = value
  end
end

#title ⇒ Object Also known as: name 



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# File 'lib/knj/knjdb/libknjdb_row.rb', line 113

def title
  if @args[:col_title]
    return @data[@args[:col_title].to_sym]
  end
  
  if @data.key?(:title)
    return @data[:title]
  elsif @data.key?(:name)
    return @data[:name]
  end
  
  raise "'col_title' has not been set for the class: '#{self.class.to_s}'."
end

#to_hash ⇒ Object 



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# File 'lib/knj/knjdb/libknjdb_row.rb', line 133

def to_hash
  return @data.clone
end

#update(newdata) ⇒ Object 



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# File 'lib/knj/knjdb/libknjdb_row.rb', line 66

def update(newdata)
  self.db.update(@args[:table], newdata, {@args[:col_id] => self.id})
  self.reload
  
  if self.ob
    self.ob.call("object" => self, "signal" => "update")
  end
end