18 lines
933 B
Markdown
18 lines
933 B
Markdown
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# persistance vs model update of a room
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## persist first, return update object, update model with update object
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-
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## update model first, return update object, persist with update object
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- not all models exist at all times (timeline only when room is "open"),
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so model to create timeline update object might not exist for persistence need
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## persist, update, each only based on sync data (independent of each other)
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- possible inconsistency between syncing and loading from storage as they are different code paths
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+ storage code remains very simple and focussed
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## updating model and persisting in one go
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- if updating model needs to do anything async, it needs to postpone it or the txn will be closed
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## persist first, read from storage to update model
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+ guaranteed consistency between what is on screen and in storage
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- slower as we need to reread what was just synced every time (big accounts with frequent updates)
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