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Trying to understand Mixed DML operations.
Hi there
There are many posts on this forum already on how to fix Mixed DML Operations.
I am not asking for how to solve this. Obviously using the @future method is one way to do it, if not the only.
I'm hoping for someone to explain to me why is that a problem? Why can I not create an account and a user within the same transaction? The documentation says it'll affect the access to records in the org. However, I don't think I understand what that means.
I have already looked at a lot of the official documentation, so instead of sending URLs to official documentation, I hope someone can explain that to me in plain English.
Thank you very much!
King
There are many posts on this forum already on how to fix Mixed DML Operations.
I am not asking for how to solve this. Obviously using the @future method is one way to do it, if not the only.
I'm hoping for someone to explain to me why is that a problem? Why can I not create an account and a user within the same transaction? The documentation says it'll affect the access to records in the org. However, I don't think I understand what that means.
I have already looked at a lot of the official documentation, so instead of sending URLs to official documentation, I hope someone can explain that to me in plain English.
Thank you very much!
King
My understanding of the issue is it because objects like User are Setup Objects (https://developer.salesforce.com/docs/atlas.en-us.api_tooling.meta/api_tooling/reference_objects_setup.htm). Since setup objects affect metadata, their creation happen in the setup area of Salesforce. When you create non-setup objects (e.g., Accounts, et cetera), they run in the normal user context. Therefore, the "problem" is the context switching synchronously. My guess is @future running asynchronously is the reason it is a solution.
In more plain English: If I am on the Account page then click Setup, I no longer have access to the Accounts tab information and vice versa. It is trying to press a button in two rooms at the same time with a locked door in between. One of them has to happen later. *smile*