How to do math operations in fields of the same content type

Posted by carlos.lg on November 8, 2012 at 3:55pm

Hi, this is my problem:
I have created my own content type with CCK and it has 2 fields like this:
Content Type1: Companies
field1: Company name
filed2: number of workers

There are some users and they add their company name the number of worker that work there. I want to make math operations (add, subtract, multiply, etc) with the number of workers of the company that I choose. For example to the workers of one company I want to add a number and to the workers of the other company I want to multiply for another number. Al these results Im going to show in a Display in Views in a table. I tried to do this with Views_Calc but this module acts on the entire array of the number of workers, I dont know how to make the math operations only with the number of workers of the company that I choose, not with all the companies. I dont know PHP but I tried to use Custom Field but I can not solve my problem.
I would appreciate any help. Thanks

Comments

Computed Field or custom module

Posted by spovlot on November 9, 2012 at 12:39pm

Generally when someone want to calculate a value, the calculation is the same on all nodes of the same content type. How will you define what calculation will be done on an individual company? Perhaps you can add a field to the content type to define the calculation.

You can either use the Computed Field (http://drupal.org/project/computed_field) or a custom module to accomplish this. Either way you will need to use PHP to perform the calculations.

Thanks for your answer, I

Posted by carlos.lg on November 9, 2012 at 2:39pm

Thanks for your answer, I used this module but I couldn't solve my problem, please you know where I can read an extra information about Computed Field, I need to read some examples about this.
My best regards

you need to study php to get

Posted by ludo1960 on November 9, 2012 at 3:09pm

you need to study php to get it to work, or post an example!

Computed Field examples and Rules

Posted by spovlot on November 9, 2012 at 9:33pm

You can find the documentation and several examples at http://drupal.org/node/126522/.

Another option might be to use the Rules module to perform the calculation when the content is saved.

I read the examples about

Posted by carlos.lg on November 12, 2012 at 9:45pm

I read the examples about Computed Field that you give me and I finally obtain the results that I was looking for. Thanks for share your knowledge with me