Class: Knj::Datarow_custom

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

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(data, args) ⇒ Datarow_custom

Returns a new instance of Datarow_custom.



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# File 'lib/knj/datarow_custom.rb', line 75

def initialize(data, args)
  if data.is_a?(Hash)
    @data = Knj::ArrayExt.hash_sym(data)
    @id = self.id
  else
    @id = data
    self.reload
  end
end

Class Method Details

.add(d) ⇒ Object 



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# File 'lib/knj/datarow_custom.rb', line 63

def self.add(d)
  return @events.call(:add, d)
end

.datarow_init(d) ⇒ Object

Initializes variables on the class from objects.



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# File 'lib/knj/datarow_custom.rb', line 10

def self.datarow_init(d)
  @@ob = d.ob
  @@db = d.db
end

.events ⇒ Object 



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# File 'lib/knj/datarow_custom.rb', line 51

def self.events
  if !@events
    @events = Knj::Event_handler.new
    @events.add_event(:name => :add, :connections_max => 1)
    @events.add_event(:name => :update, :connections_max => 1)
    @events.add_event(:name => :data_from_id, :connections_max => 1)
    @events.add_event(:name => :delete, :connections_max => 1)
  end
  
  return @events
end

.has_one(arr) ⇒ Object 



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# File 'lib/knj/datarow_custom.rb', line 15

def self.has_one(arr)
  arr.each do |val|
    methodname = nil
    colname = nil
    classname = nil
    
    if val.is_a?(Symbol)
      classname = val
      methodname = val.to_s.downcase.to_sym
      colname = "#{val.to_s.downcase}_id".to_sym
    elsif val.is_a?(Array)
      classname, colname, methodname = *val
    elsif val.is_a?(Hash)
      classname, colname, methodname = val[:class], val[:col], val[:method]
    else
      raise "Unknown argument-type: '#{arr.class.name}'."
    end
    
    methodname = classname.to_s.downcase if !methodname
    colname = "#{classname.to_s.downcase}_id".to_sym if !colname
    
    define_method(methodname) do
      return @@ob.get_try(self, colname, classname)
    end
    
    methodname_html = "#{methodname.to_s}_html".to_sym
    define_method(methodname_html) do |*args|
      obj = self.send(methodname)
      return @@ob.events.call(:no_html, classname) if !obj
      
      raise "Class '#{classname}' does not have a 'html'-method." if !obj.respond_to?(:html)
      return obj.html(*args)
    end
  end
end

.table ⇒ Object 



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# File 'lib/knj/datarow_custom.rb', line 67

def self.table
  return self.name.split("::").last
end

Instance Method Details

#[](key) ⇒ Object

Returns a key from the hash that this object is holding or raises an error if it doesnt exist.



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# File 'lib/knj/datarow_custom.rb', line 100

def [](key)
  raise "No data spawned on object." if !@data
  raise "No such key: '#{key}'. Available keys are: '#{@data.keys.sort.join(", ")}'." if !@data.key?(key)
  return @data[key]
end

#delete ⇒ Object 



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# File 'lib/knj/datarow_custom.rb', line 129

def delete
  self.class.events.call(:delete, Knj::Hash_methods.new(:object => self))
end

#destroy ⇒ Object 



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# File 'lib/knj/datarow_custom.rb', line 133

def destroy
  @data = nil
end

#each(&args) ⇒ Object 



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# File 'lib/knj/datarow_custom.rb', line 137

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

#id ⇒ Object

Returns the ID of the object.



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# File 'lib/knj/datarow_custom.rb', line 107

def id
  return self[:id]
end

#is_knj? ⇒ Boolean

Used to determine if this is a knj-datarow-object.

Returns:

  • (Boolean) 


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# File 'lib/knj/datarow_custom.rb', line 5

def is_knj?
  return true
end

#name ⇒ Object Also known as: title

Returns the name of the object, which can be taken from various data or various defined methods.



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# File 'lib/knj/datarow_custom.rb', line 112

def name
  if @data.key?(:title)
    return @data[:title]
  elsif @data.key?(:name)
    return @data[:name]
  end
  
  obj_methods = self.class.instance_methods(false)
  [:name, :title].each do |method_name|
    return self.method(method_name).call if obj_methods.index(method_name)
  end
  
  raise "Couldnt figure out the title/name of the object on class #{self.class.name}."
end

#reload ⇒ Object 



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# File 'lib/knj/datarow_custom.rb', line 85

def reload
  raise "No 'data_from_id'-event connected to class." if !self.class.events.connected?(:data_from_id)
  data = self.class.events.call(:data_from_id, Knj::Hash_methods.new(:id => @id))
  raise "No data was received from the event: 'data_from_id'." if !data
  raise "Data expected to be a hash but wasnt: '#{data.class.name}'." if !data.is_a?(Hash)
  @data = Knj::ArrayExt.hash_sym(data)
end

#table ⇒ Object 



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# File 'lib/knj/datarow_custom.rb', line 71

def table
  return self.class.table
end

#update(data) ⇒ Object 



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# File 'lib/knj/datarow_custom.rb', line 93

def update(data)
  ret = self.class.events.call(:update, Knj::Hash_methods.new(:object => self, :data => data))
  self.reload
  return ret
end