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move default value of lastVersion into function body

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This commit is contained in:
Brian Gough 2015-09-23 16:31:33 +01:00
parent bdf1d267f0
commit 2ab1778dd9
1 changed files with 12 additions and 4 deletions
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16
services/track-changes/app/coffee/UpdatesManager.coffee
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@ -14,10 +14,18 @@ module.exports = UpdatesManager =
if length == 0
return callback()
MongoManager.popLastCompressedUpdate doc_id, (error, lastCompressedUpdate, lastVersion = lastCompressedUpdate?.v) ->
# lastCompressedUpdate may be null if we are forcing the start
# of a new compressed update, in which case we have the
# lastVersion to check consistency (defaults to lastCompressedUpdate.v)
MongoManager.popLastCompressedUpdate doc_id, (error, lastCompressedUpdate, lastVersion) ->
# lastCompressedUpdate is the most recent update in Mongo.
#
# The popLastCompressedUpdate method may pass it back as 'null'
# to force the start of a new compressed update, even when there
# was a previous compressed update in Mongo. In this case it
# passes back the lastVersion from the update to check
# consistency.
# when lastVersion is not provided, default to lastCompressedUpdate.v
lastVersion ?= lastCompressedUpdate?.v
return callback(error) if error?
# Ensure that raw updates start where lastVersion left off