How to handle zero id values ?

[Dev_Guy]

I'm developing a library that is basically a wrapper for the different PS resources.

The thing is that looking at the values returned by some resources I have noticed that sometimes I receive a zero value as the identifier of a resource.

For example: If I call the addresses resource I receive a Json with the following form:

{
	"address": {
		"id": 2,
		"id_customer": "2",
		"id_manufacturer": "0",
		"id_supplier": "0",
		"id_warehouse": "0",
		"id_country": "8",
		"id_state": "0",
		"alias": "Mon adresse",
		"company": "My Company",
		"lastname": "DOE",
		"firstname": "John",
		"vat_number": "",
		"address1": "16, Main street",
		"address2": "2nd floor",
		"postcode": "75002",
		"city": "Paris ",
		"other": "",
		"phone": "0102030405",
		"phone_mobile": "",
		"dni": "",
		"deleted": "0",
		"date_add": "2021-09-03 20:40:16",
		"date_upd": "2021-09-03 20:40:16"
	}
}

As you can see in the example, the value of id_state is "0" but when I call the states resource with the value 0, it returns a 404 NOT FOUND code.

Reading the documentation, the value of id_state is isNullOrUnsignedId so I understand that if that resource does not exist it should return null instead of 0 right?

My question is, how should I interpret the value 0 in this context?

Additionally, it says that the value of id_state should be isNullOrUnsignedId but it actually returns a String with a numeric value. It's not a big problem but I don't understand why it's a String, in fact, the only really numeric value is the first one ("id"), the rest are Strings

I don't know if I'm doing something wrong or I'm misunderstanding something

Any clarification is welcome

Thank you very much and sorry for the inconvenience

Best Regards

[Webkul Solutions]

On 2/15/2025 at 7:44 PM, Dev_Guy said:

I'm developing a library that is basically a wrapper for the different PS resources.

The thing is that looking at the values returned by some resources I have noticed that sometimes I receive a zero value as the identifier of a resource.

For example: If I call the addresses resource I receive a Json with the following form:

{
	"address": {
		"id": 2,
		"id_customer": "2",
		"id_manufacturer": "0",
		"id_supplier": "0",
		"id_warehouse": "0",
		"id_country": "8",
		"id_state": "0",
		"alias": "Mon adresse",
		"company": "My Company",
		"lastname": "DOE",
		"firstname": "John",
		"vat_number": "",
		"address1": "16, Main street",
		"address2": "2nd floor",
		"postcode": "75002",
		"city": "Paris ",
		"other": "",
		"phone": "0102030405",
		"phone_mobile": "",
		"dni": "",
		"deleted": "0",
		"date_add": "2021-09-03 20:40:16",
		"date_upd": "2021-09-03 20:40:16"
	}
}

As you can see in the example, the value of id_state is "0" but when I call the states resource with the value 0, it returns a 404 NOT FOUND code.

Reading the documentation, the value of id_state is isNullOrUnsignedId so I understand that if that resource does not exist it should return null instead of 0 right?

My question is, how should I interpret the value 0 in this context?

Additionally, it says that the value of id_state should be isNullOrUnsignedId but it actually returns a String with a numeric value. It's not a big problem but I don't understand why it's a String, in fact, the only really numeric value is the first one ("id"), the rest are Strings

I don't know if I'm doing something wrong or I'm misunderstanding something

Any clarification is welcome

Thank you very much and sorry for the inconvenience

Best Regards

This is PrestaShop behaviour that every value will come as a string instead of the table primary key. 

To meet your requirement, you can modify the output response using the files below.

For JSON: ROOT_DIR/classes/webservice/WebserviceOutputJSON.php

For XML: ROOT_DIR/classes/webservice/WebserviceOutputXML.php