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Class: RowObject Twisted-0.19.0/twisted/enterprise/row.py

I represent a row in a table in a relational database.

My class is "populated" by a DBReflector object. After I am populated, instances of me are able to interact with a particular database table.

You should use a class derived from this class for each database table.

enterprise.Augentation.loadObjectsFrom() is used to create sets of instance of objects of this class from database tables.

Once created, the "key column" attributes cannot be changed.

Methods   
__setattr__
assignKeyAttr
createDefaultAttributes
findAttribute
setDirty
  __setattr__ 
__setattr__ (
        self,
        name,
        value,
        )

Special setattr to prevent changing of key values.

Exceptions   
DBError("cannot assign value <%s> to key column attribute <%s> of RowObject class" %( value, name ) )
  assignKeyAttr 
assignKeyAttr (
        self,
        attrName,
        value,
        )

Assign to a key attribute.

This cannot be done through normal means to protect changing keys of db objects.

Exceptions   
DBError( "%s is not a key columns." % attrName )
  createDefaultAttributes 
createDefaultAttributes ( self )

Populate instance with default attributes.

This is used when creating a new instance NOT from the database.

  findAttribute 
findAttribute ( self,  attrName )

Find an attribute by caseless name.

Exceptions   
DBError( "Unable to find attribute %s" % attrName )
  setDirty 
setDirty ( self,  flag )

Use this to set the dirty flag.

(note: this avoids infinite recursion in __setattr__, and prevents the dirty flag )


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