Mixed dml exception. A Mixed DML exception occurs when you try to modify setup and non-setup ob...
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Mixed dml exception. A Mixed DML exception occurs when you try to modify setup and non-setup objects in the same transaction during DML operations. Let see Different types of Exceptions in Salesforce and how to solve them with Salesforce best practices. Dec 23, 2021 · MIXED DML Exception Custom settings + UserPackageLicense I am trying to update a Custom Setting record and insert an UserPackageLicense record in the same transaction, however I am facing MIXED DML exception. Jul 5, 2024 · Maybe I'm missing something, but my understanding was that System. I tried putting createTestUser() inside and outside test. May 26, 2023 · Exception are unexpected event occurred during your transaction execution. Nov 27, 2017 · So I have some code below that causes the error: System. Feb 21, 2022 · Now I get MIXED-DML-OPERATION exception. See sObjects That Cannot Be Used Together in DML Operations. DmlException: Insert failed. , User, Profile, PermissionSet) manage org configuration, while non-setup objects (e. Nov 10, 2021 · What is the reason that salesforce introduced Mixed DML Exception? Ask Question Asked 4 years, 3 months ago Modified 4 years, 3 months ago Jan 18, 2019 · What is a Mixed DML Exception? The Mixed DML Exception occurs in Salesforce when you attempt to perform DML operations on both non-setup objects (such as Account or Contact) and setup objects (like User or Group) within a single transaction. Are you struggling with the notorious "Mixed DML Error" in Salesforce? In this video, we dive deep into what causes this common Salesforce error and provide step-by-step solutions to fix it. Jun 25, 2025 · The core principle to resolve Mixed DML errors is to separate the DML operations into different transactions. runAs() would allow performing mixed DML operations by executing in a separate context. Discover how to fix this common Apex issue in your code. DML operations on certain sObjects, sometimes referred to as setup objects, can’t be mixed with DML on other sObjects in the same transaction. You cannot perform both types of DML in a single atomic unit of work. Oct 11, 2025 · Learn why the Salesforce Mixed DML error happens when updating setup and non-setup objects. First exception on row 0; first error: MIXED_DML_OPERATION, DML operation on setup object is not permitted aft Jan 3, 2023 · MIXED_DML_OPERATION: DML in flow Ask Question Asked 3 years, 1 month ago Modified 2 years, 5 months ago Jun 24, 2025 · A Mixed DML Operation occurs when you attempt to perform DML operations on both setup and non-setup objects within the same transaction. So it looks like the RunAs workaround is not a workaround but is assumed by Salesforce as the only way of going by the mixed DML issue. The only solution I found to avoid this exception in my batch, is to put the insert new Log(); DML into a Queueable class. I need to run as the user I am creating and I also need a lead. Dec 12, 2022 · What is a Mixed DML Operation Error? A mixed DML Operation Error comes when you try to perform DML operations on setup and non-setup objects in a single transaction. startTest(). Why Does Salesforce Enforce This Restriction?. Salesforce applies this restriction to protect data integrity and avoid potential conflicts in the database. , Account, Contact) handle business data. This restriction exists because some sObjects affect the user’s access to records in the org. However, within that context, you could still get a DML exception. What is a Mixed DML Exception? In Salesforce, setup objects (e. Jul 28, 2020 · First exception on row 0; first error: MIXED_DML_OPERATION, DML operation on setup object is not permitted after you have updated a non-setup object (or vice versa): Lead, original object: User: []. g.
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