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docs: clarify CAS/CAD do not work on directories

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As noted in #4075. There are numerous style issues with this document
but I don't want to go down that rabbit hole so this is an attempt at a
minimally invasive clarification.
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Jonathan Boulle 2015-12-27 21:13:58 +01:00
parent 729b530c48
commit 216c6674ed
1 changed files with 4 additions and 0 deletions
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Documentation/api.md
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@ -500,6 +500,8 @@ etcd can be used as a centralized coordination service in a cluster, and `Compar
This command will set the value of a key only if the client-provided conditions are equal to the current conditions.
_Note that `CompareAndSwap` does not work with [directories](#listing-a-directory). If an attempt is made to `CompareAndSwap` a directory, a 102 "Not a file" error will be returned._
The current comparable conditions are:
1. `prevValue` - checks the previous value of the key.
@ -585,6 +587,8 @@ We successfully changed the value from "one" to "two" since we gave the correct
This command will delete a key only if the client-provided conditions are equal to the current conditions.
_Note that `CompareAndDelete` does not work with [directories](#listing-a-directory). If an attempt is made to `CompareAndDelete` a directory, a 102 "Not a file" error will be returned._
The current comparable conditions are:
1. `prevValue` - checks the previous value of the key.