Module: RestChange

Included in:
ActiveOrient::OrientDB
Defined in:
lib/rest/change.rb

Instance Method Summary collapse

Instance Method Details

#alter_property(o_class, property:, attribute: "DEFAULT", alteration:) ⇒ Object

Used to add restriction or other properties to the Property of a Class.

See http://orientdb.com/docs/2.1/SQL-Alter-Property.html



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# File 'lib/rest/change.rb', line 98

def alter_property o_class, property:, attribute: "DEFAULT", alteration:  # :nodoc: because untested
  logger.progname = 'RestChange#AlterProperty'
  begin
    attribute.to_s! unless attribute.is_a? String
    attribute.capitalize_first_letter
    case attribute
    when "LINKEDCLASS", "LINKEDTYPE", "NAME", "REGEX", "TYPE", "REGEX", "COLLATE", "CUSTOM"
      unless alteration.is_a? String
        logger.error{"#{alteration} should be a String."}
        return 0
      end
    when "MIN", "MAX"
      unless alteration.is_a? Integer
        logger.error{"#{alteration} should be an Integer."}
        return 0
      end
    when "MANDATORY", "NOTNULL", "READONLY"
      unless alteration.is_a? TrueClass or alteration.is_a? FalseClass
        logger.error{"#{alteration} should be an Integer."}
        return 0
      end
    when "DEFAULT"
    else
      logger.error{"Wrong attribute."}
      return 0
    end

    name_class = classname(o_class)
    execute name_class, transaction: false do # To execute commands
      [{ type: "cmd",
        language: 'sql',
        command: "ALTER PROPERTY #{name_class}.#{property} #{attribute} #{alteration}"}]
    end
  rescue Exception => e
    logger.error{e.message}
  end
end

#change_database(name) ⇒ Object

Changes the working-database to name



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# File 'lib/rest/change.rb', line 7

def change_database name
  @classes = []
  @database = name
  ActiveOrient.database = name
end

#patch_record(rid) ⇒ Object Also known as: patch_document

Lazy Updating of the given Record.



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# File 'lib/rest/change.rb', line 75

def patch_record rid      # :nodoc:   (used by Model#update )
  logger.progname = 'RestChange#PatchRecord'
  content = yield
  if content.is_a? Hash
    begin
      @res["/document/#{ActiveOrient.database}/#{rid}"].patch content.to_orient.to_json
    rescue Exception => e
      logger.error{e.message}
    end
  else
    logger.error{"FAILED: The Block must provide an Hash with properties to be updated"}
  end
end

#update(record, attributes, version = 0) ⇒ Object

Convient update of the dataset by calling sql-patch

The argument record can be specified as ActiveOrient::Model-instance or as rid-string( #0:0 )

called from ModelRecord#update

if the update was successful, the updated ActiveOrient::Model-record is returned.



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# File 'lib/rest/change.rb', line 25

def update record, attributes , version=0   # :nodoc: 
  r = if record.is_a?(String) && record.rid?
    ActiveOrient::Model.autoload record 
  else
 record
  end
  return(false) unless r.is_a?(ActiveOrient::Model)
  version = r.version if version.zero?
  result = patch_record(r.rid) do
    attributes.merge({'@version' => version, '@class' => r.class.ref_name })
  end
  # returns a new instance of ActiveOrient::Model and updates any reference on rid
  # if the patch is not successfull no string is returned and thus no record is fetched
 #   puts JSON.parse(result) if result.is_a?(String)
  ActiveOrient::Model.orientdb_class(name: r.class.ref_name, superclass: :find_ME ).new(JSON.parse(result))  if result.is_a?(String)
end

#update_records(o_class, set: {}, where: {}, remove: nil) ⇒ Object

Example:

ORD.update_documents classname, set: {:symbol => 'TWR'}, where: {con_id: 340}

Replaces the symbol to TWR in each record where the con_id is 340

Both set and where take multiple attributes

Returns the JSON-Response.



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# File 'lib/rest/change.rb', line 54

def update_records o_class, set:{}, where: {}, remove: nil
  logger.progname = 'RestChange#UpdateRecords'
  url = if set.present?
    "UPDATE #{classname(o_class)} SET #{generate_sql_list(set)} #{compose_where(where)}"
  elsif remove.present?
    "UPDATE #{classname(o_class)} remove #{remove} #{compose_where(where)}"
  end
  r = @res[URI.encode("/command/#{ActiveOrient.database}/sql/" << url)].post ''
  count_of_updated_records = (JSON.parse( r))['result'].first['value']
   ## remove all records of the class from cache
  ActiveOrient::Base.display_rid.delete_if{|x,y| y.is_a? o_class } if count_of_updated_records > 0 && o_class.is_a?(Class)
  count_of_updated_records # return_value
  rescue Exception => e
       logger.error{e.message}
   nil

  
end