[Rails] Generating Class Diagram from Models

Hi all! There are several softwares which read a database and shows the tables graphically on the screen (now I`m using Power Architect: http://www.sqlpower.ca/page/architect). Is there something which beyond to read the tables, can understand the relationship beetween it from app/models files

[Rails] Generating Class Diagram from Models

Hi all! There are several softwares which read a database and shows the tables graphically on the screen (now I`m using Power Architect: http://www.sqlpower.ca/page/architect). Is there something which beyond to read the tables, can understand the relationship beetween it from app/models files