Math Calculation between fields

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#1

I load a grid from a Table, using:



$grid->render_table(“authors”,“authors_id”,“authors_product,authors_author,authors_genre,Pub_Date,Price,Quantity”);



but i want a calculated column: PriceQuantity, named Total.

So, i have this:



mygrid.setHeader(“Title, Author, Genre, Date, Price, Quantity,Total”);

mygrid.setColTypes("ed,ed,co,dhxCalendar,price,ed,ro[=c4c5]");



and all works fine.



BUT!..

when i do this:



$grid->render_table(“authors”,“authors_id”,“authors_product,authors_author,authors_genre,Pub_Date,Price,Quantity,City”);



mygrid.setHeader(“Title, Author, Genre, Date, Price, Quantity,Total,City”);

mygrid.setColTypes(“ed,ed,co,dhxCalendar,price,ed,ro[=c4*c5]”,ed);



doesn�t work any more.

because the data of the field ‘City’ overwrite my calculated column ‘Total’



How can i fix this?





#2


Try to define render_table method as follow:


$grid->render_sql(“select *, ‘’ as dummy from authors”,“authors_id”,“authors_product,authors_author,authors_genre,Pub_Date,Price,Quantity,dummy,City”);

#3

If you plan to use data saving functionality , you will need to use beforeProcessing event and delete dummy field from list of fields used in server side actions ( please inform if you need more details )