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--- 01_user_documentation:06_graph:05_derivation:02_transaction [2025/05/28 13:55] – sophiewachtel
+++ 01_user_documentation:06_graph:05_derivation:02_transaction [2025/11/03 05:34] (current) – gaetan
@@ Line 4: / Line 4: @@
 Not sure if this should be a section or a "feature" page.
-Transactions act as buffers for operations on the project graph. Each transaction maintains a set of **queues**, where each queue holds a list of modifications to be applied to the graph.
+Transactions act as buffers for operations on the project graph. Each transaction maintains a set of **queues**, where each queue holds a list of modifications to be applied to the graph. When any **RGG method** is executed, GroIMP automatically creates a transaction if one does not already exist. All subsequent graph modifications during that operation are pushed into the current transaction's queues.
-When any **RGG method** is executed, GroIMP automatically creates a transaction if one does not already exist. All subsequent graph modifications during that operation are pushed into the current transaction's queues.
+======  ======
-All transactions are **logged** in a transaction cache, which allows the following:
-  * **Undo** — You can traverse the log in reverse to undo previous operations by reversing the transactions.
-  * **Redo** — Undone transactions can be reapplied, restoring the graph to its former state.
-Once a new transaction is initiated (e.g. by):
-  * Running a new RGG function,
-  * Modifying an object through the attribute editor,
-  * Adding an object via the menu,
-the previous redo history is **discarded**. That means GroIMP does **not** support branching histories like version control systems.
-**Example of an unsupported sequence:**
-  - Undo → Apply new operation → Redo ❌
-After a new operation is applied following an undo, the redo path is no longer available.
-====== ======
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