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Forum Discussion
Obj-C API 2: DBFILESWriteMode - using -initWithUpdate with file revs vs -initWithOverwrite:
In API 1, to overwite an existing file on the server, it was always necessary (as I understand it) to provide the file rev of the existing file. If you didn't do this, you would receive an error. Oth...
Hi Keith, for reference, yes, in API v1 it was also possible to just overwrite a file without a rev. In either though, it's generally not reccomended, as its easy to overwrite data you didn't intend to due to race conditions that way.
1. That's correct, with autorename set to NO, the API won't attempt to find somewhere to put the file, and will just returned the conflict error. And correct, the YES behavior will successfully commit the file, just at a different path, like the API v1 behavior you describe.
2. Yes, we definitely recommend using update instead of overwrite, because of the potential of race conditions, as mentioned above. (E.g., if two instances of your app happen to upload new versions at about the same time, one will blow away the other version.)
Greg-DB
Dropbox Staff
Dropbox StaffHi Keith, for reference, yes, in API v1 it was also possible to just overwrite a file without a rev. In either though, it's generally not reccomended, as its easy to overwrite data you didn't intend to due to race conditions that way.
1. That's correct, with autorename set to NO, the API won't attempt to find somewhere to put the file, and will just returned the conflict error. And correct, the YES behavior will successfully commit the file, just at a different path, like the API v1 behavior you describe.
2. Yes, we definitely recommend using update instead of overwrite, because of the potential of race conditions, as mentioned above. (E.g., if two instances of your app happen to upload new versions at about the same time, one will blow away the other version.)
Great, thanks!
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