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I am using Drupal 7 and I want to create tables which have primary key and foreign keys using content types. Each table would be created using content types. Let's say, when I create Fruit content type, it should create a table for it, right? Then, I may have Price table, hence, I create a Price content type. Now, the Fruit id(primary key) should be connected with Fruit id in the Price table (content type). How's this possible? I don't know how to code the tables/content type schema.

Thanks for your help.

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  • It would be great to have this feature. I always think it's backward to make a db abstraction layer that removes functionality and makes things inefficient just to help in the one off chance you'll ever want to change your database back end...
    – artfulrobot
    Commented Apr 3, 2012 at 10:04

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Following link has a long discussion about foreign key in Groups.Drupal

=> Add join/foreign key info to schema

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  • yep, it's a good discussion. not v. satisfactory, and it ended in 2009.
    – artfulrobot
    Commented Apr 3, 2012 at 10:03
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I think this is what you want: References Module

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