Its important to highlight that this post assumes you are already familiar with proper subform creation in Zoho Creator. If you are not please check out our Master Zoho Creator Subforms course in the url below before implementing this custom function.

https://www.udemy.com/master-zoho-creator-subforms/

That being said let´s jump on to the process in question. We are using a Gym App for testing and the goal is to add Classes to a New Member dinamically so user does not have to add classes everytime.

First, you need to call ( get ) the Member record you are going to be working with. Second, you want to create a Form with the records you want to add. In this case our Main Courses is a predetermined number of classes a member can take. You can update this records , delete them or add more as needed. The custom function will iterate through all these records in order to add them into the corresponding subform.

And last but not least you push ( Add ) the records in the Main Classes form into the subform Classes as shown in the custom function below

Custom Function

void Create.subformrows(int mid)
{
//First Step: To call ( get ) the record in question.
member = Members[ID == input.mid];
info member.ID;
//Second Step: Iterate through the records you want to add to the subform
for each rec in Main_Clasess[ID != null]
{
//Step Three: Insert data into the subform
cla = insert into Clases
[
Added_User=zoho.loginuser
Name=rec.Name
Description=rec.Description
Coaches=rec.Coaches
MemberID=member.ID
];
}
}

1.- Linking Subform

2.- Fetching Record information

3.- Aggregate row data

4.- Deleting unmatched record ID´s

Rarely thought through, but does save hundreds of $dollars down the road. Find out more details on our Leverage Zoho Courses.  Get additional scripts and put your zoho application on steroids.

The first step is to have the Subtotal or Total field value in the Order Form. Normally this would be a currency field or decimal field if you need to consider 1 or more decimals into your calculations. If not you can also set it the field as a Numeric value field. Our example uses a currency field.

Second, you need to think about the places where the script to aggregate the rows needs to occur. In our case, there are several places. On Add Row, On Selecting a new Product, On Changing the Qty amount or the pricing. It is important that all scenarios are considered otherwise your calculations may not be properly aggregated if it encounters a scenario that you have not considered in your scripting yet.

Last but not least, the script below is ready for you to copy and paste into your application. Assuming of course that the field names of your Order Form are named exactly as our test application.

if ((row.Price != null)  &&  (row.Qty  !=  null))

{
    row.SubTotal = (row.Price  *  row.Qty);
}
t = 0.0;
if ((row.Price  !=  null)  &&  (row.Qty  !=  null))
{
    for each rec in Item_Details
    {
        t = (rec.SubTotal  +  t);
    }
}
input.Subtotal = t;

Do not hesitate to contact me if you have any questions. I would be more than glad to help you build an amazing online database application with Zoho Creator. Or check out our full Master Zoho Creator Subforms Course to learn more.

To build a robust Order form in Zoho Creator you need to be able to automatically "fetch" the information about a product and let the system pre-populates the subform with pre-existing data in the Products Table.

First, you need to have a Products form with all the relevant information about the Product. Price, Description, etc.

Second, you  need to fetch the Product information-based "On user input" inside the items Subform and add the below deluge scripting.

prodct  =  Products  [ID == row.Product];
row.Description = prodct.Description;
row.Price = prodct.Price;
row.Qty = 1;
if ((row.Price  !=  null)  &&  (row.Qty  !=  null))
{
    row.SubTotal = (row.Price  *  row.Qty);
} 

This is the most important step in the process of setting up your Zoho Creator database. A properly linked setup will enable your information to run smoothly and avoid wasting space ( MB )

First, you need to create at least 2 Forms. For example.- Orders and Items. An Order can have multiple items and 1 item can be part of many Orders. Creating many to many relationships.

Second, you need to add the Subform Items inside the Form Orders and name it. Then you have to add a Lookup field in the Items Form and click on Existing Relations. 

Do NOT forget this part. This is the key. You must have a lookup field linking the original Form to each record on the subform you are creating. Makes Sense?

If it does not or need any help do not hesitate to contact us. We can guide you through the process to set your Subform for success.