How to enable only one shipping method to some products?

[hankliu]

You could add a new field to products such as products_is_fragile

Then you can test the cart to see if there are any fragile products in it ...

From that result, you can then enable or disable a shipping module ...

Or get the count on how many are fragile and adjust accordingly on the price ...

This is great. Any direction on how to do this? I think it is supposed to be difficult.

[Ajeh]

One way to do it is to find a similar field to what you are trying to make ...

You want to make a field such as:
product_is_fragile

And that would be added to the products table as a: tinyint 1

To find a similar field to "trace" and follow the pattern of, you could use:
product_is_call

Note: this field has "functionality" as well ... so some places are not necessary to duplicate this field ...

But using this field, you could use the Developer's Tool Kit and see where it is referenced in the admin for the purpose of adding/editing ...

Once you can add/edit the products with this new field, you can then use it in the catalog, such as in a shipping module to manage when they should show or not show ...

Zen Cart is made of patterns ... so cloning something similar to what you need is usually a matter of finding the "keys" to the "pattern" ...

product_is_call
products_is_call

Should bring up all text defines and field usage for this field ...

At first it will appear overwhelming ...

Don't let that throw you ...

Remember with Product Types, Zen Cart has 5 sets of files ... so you will more or less be seeing 5 times what you might actually need to work with ...

NOTE: The admin is not overrideable ... so you will want to save your original files and your custom files for future upgrades ...

NOTE: if you are not already v1.3.6 ... it would be a good time to get there first, before building in your custom code ...

Take your time, this is not as bad as a looks ...

[hankliu]

One way to do it is to find a similar field to what you are trying to make ...

You want to make a field such as:
product_is_fragile

And that would be added to the products table as a: tinyint 1

To find a similar field to "trace" and follow the pattern of, you could use:
product_is_call

Note: this field has "functionality" as well ... so some places are not necessary to duplicate this field ...

But using this field, you could use the Developer's Tool Kit and see where it is referenced in the admin for the purpose of adding/editing ...

Once you can add/edit the products with this new field, you can then use it in the catalog, such as in a shipping module to manage when they should show or not show ...

Zen Cart is made of patterns ... so cloning something similar to what you need is usually a matter of finding the "keys" to the "pattern" ...

product_is_call
products_is_call

Should bring up all text defines and field usage for this field ...

At first it will appear overwhelming ...

Don't let that throw you ...

Remember with Product Types, Zen Cart has 5 sets of files ... so you will more or less be seeing 5 times what you might actually need to work with ...

NOTE: The admin is not overrideable ... so you will want to save your original files and your custom files for future upgrades ...

NOTE: if you are not already v1.3.6 ... it would be a good time to get there first, before building in your custom code ...

Take your time, this is not as bad as a looks ...

Thanks for the detailed direction. I will try this later. But now I have another more urgent problem to deal with. After I installed the SEO URL mod, I could not access my admin page. I already posted this in proper forum, but please help me if you have any idea about this. Thanks.