Create daynamic data model
I have many type of content(BOOK,ARTICLE,NEWS,...) and each content have different field. 

i want to 

 1. add new content to database 
 2. add new field to existing content

**without modify database structure.** 

for example i want to add Movie with fields (name,director, production date) to database.

pleas help me. thanks
Create daynamic data model
===

I have many type of content(BOOK,ARTICLE,NEWS,...) and each content have different field. 

i want to 

 1. add new content to database 
 2. add new field to existing content

**without modify database structure.** 

for example i want to add Movie with fields (name,director, production date) to database.

pleas help me. thanks