Is custom web service MUST be a POST method and why ?

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Posted on by Voltes

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hi guys,

Just being told that when we create custom Web Service, it should be for a POST method ? may I know if that is true ?

For example if I create custom web service for retrieve PO status, and the response is will tell use the PO status and each of PO line statuses, should that be a POST method also ?

Actually I want to know also where exactly we tell system that it is for GET or POST ?

I only know that if the service is for update something in F&O, I will choose POST in Postman and for retrieve I will choose GET, so this has no relation to any setting in F&O, is it not ?

Kindly help to make me better understanding.

Thanks.

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Martin Dráb 237,795 Most Valuable Professional on at

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Regarding "where exactly we tell system that it is for GET or POST", you have no such a choice when creating a custom service in F&O. The decision was done by Microsoft. You use POST to call a custom service and GET to get description of the service (see Discovery of JSON-based custom services in AX 7).

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Voltes 596 on at

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Hi Martin,

Thank you for this information.

"The decision was done by Microsoft", may I know the reason behind this "rule" ?

So, can I confirmed that:

1. for using custom service, it will always POST method.

2. for using data entity, it will be GET method ?

Thanks.

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Martin Dráb 237,795 Most Valuable Professional on at

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You'd need to ask Microsoft why they chose a different design than what you'd like.

I guess you mean OData services when saying "or using data entity". That's using OData protocol, which is a completely different thing. There you use GET to get data, and POST, PATCH and DELETE to change data. If you're interested in details, refer to OData documentation.

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Voltes 596 on at

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Hi Martin,

Yes, what I mean by data entity is OData.

But, for the "why", I just want to know the reason, although I'm quite happy to just follow what has been defined. I'm not here for doing what I like, basically :D

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