Custom field default valie

Hi,

It might be possible.
Could you provide a screenshot of the settings of the custom field ?
Could you also provide the URL of the shop ?
And finally, could you explain why you're trying to do that ?
Based on your anwsers, we might be able to provide a solution, or an alternative.

Hi,

I'm happy to help but you need to answer to my questions first.
Could you provide a screenshot of the settings of the custom field ? Based on how the custom field is configured, the code to use will be different. I can't provide any code if you don't provide the settings of the custom fields.
Could you also provide the URL of the shop ? This is to be able to better understand how your checkout is configured in order to do this. It can also affect how the code needs to be written.
Why having a custom field with the first name and last name of the user in another custom field than the default first name and last name custom fields of the address would help in your case ?

Hi,

Thanks, it's clearer. However, I still am not sure why you need this.

Let's take the example of our demo website. If you add something to the cart and go to the checkout, on the registration form you can see this: i.imgur.com/atq3L2b.png
So, if I understand, you would like that on this form, when someone enters something in the "name" field at the top, it automatically fill the first name a last name fields. Is that correct ?
While not impossible, this would require adding custom javascript code to the registration form.

In this case, I would recommend a simpler approach. If you set the "registration" setting to "simplified registration" or "simplified registration with password" instead of "registration" under the Checkout tab of the HikaShop configuration, then the name field will be removed from that form.
Instead, the name of the Joomla user will be filled automatically with the first name and last name entered in the address.

Hi,

If you look at the example I gave you, the user is not yet logged in and the firstname and lastname fields are visible.
So this means that in this case it is impossible to get the name of the user account to prefill the firstname and lastname fields of the form, since that information is not yet known to your server. It's a matter of order of the events.
That's what I was trying to explain with my example.
In this case, the only solution would be to do it with javascript code on the fly on the page.
This is still possible to add with a view override.
And if the user is logged in and you access the checkout, then the user will be logged in, and you can indeed use the information in PHP to prefill the fields, also with a view override. But normally, when the user accesses the checkout after adding a product to the cart, he is not yet logged in. And thus, you can do this.
Also, another point I didn't brought up in my previous message is that the name of the user in Joomla is in one field. And the firstname and lastname in the address are two different fields. Splitting the name from Joomla in two can be hazardous. What happens if the user enters only one word in there ? What if he enters 3 words ? What if his name is in Chinese characters without any spaces between the firstname and the lastname ? What about the order of the words ? In some countries the firstname is first when writting the full name, and in some others, the lastname comes first. Doing it the other way, by combining the firstname and lastname from the address to generate name of the user account during its creation avoids all these pitfalls. And best of all, it doesn't require any coding on your end since it's just an option to change.
Technically, you could have a mixed solution of both PHP and javascript in order to handle all this properly. If you're a developer, it's not difficult to do. You'll just spend a few hours on it or more. It's not just one or two lines of code. So since you asked about the code to do it in your initial message, I assumed you were not a developer and thus I directed you to the simplified registration option.

Hi,

If the user is already logged in when he sees the address form, then you can indeed prefill the firstname and lastname fields of the address with the name of the user. Still, it requires splitting the text in the name.

You'll want to edit the view file show_block_address via the menu Display>Views.
For example, after the line:

$this->edit_address = new stdClass();

if(emtpy($this->edit_address->address_firstname)) {
  $user = JFactory::getUser();
  $this->edit_address->address_firstname = $user->name;
}