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Fix delete relation field when _Join collection not exist #864

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merged 1 commit into from
Mar 6, 2016

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Marco129
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@Marco129 Marco129 commented Mar 6, 2016

Fix for #848
Check for existence before dropping

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Current coverage is 90.49%

Merging #864 into master will decrease coverage by -1.19% as of 76895e5

@@            master    #864   diff @@
======================================
  Files           71      71       
  Stmts         4102    4104     +2
  Branches       845     846     +1
  Methods          0       0       
======================================
- Hit           3761    3714    -47
  Partial         10      10       
- Missed         331     380    +49

Review entire Coverage Diff as of 76895e5

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@gfosco
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gfosco commented Mar 6, 2016

Nice... Thanks! 👍

gfosco added a commit that referenced this pull request Mar 6, 2016
Fix delete relation field when _Join collection not exist
@gfosco gfosco merged commit fedeff9 into parse-community:master Mar 6, 2016
@@ -409,7 +409,11 @@ class Schema {

if (this.data[className][fieldName].startsWith('relation<')) {
//For relations, drop the _Join table
return database.dropCollection(`_Join:${fieldName}:${className}`);
return database.collectionExists(`_Join:${fieldName}:${className}`).then(exist => {
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@Marco129 This is slightly racy. I don't expect people to be have many callers attempting to create and delete the same field many times, but I'd rather just avoid race conditions everywhere. Can you modify this to attempt the delete, and catch the error if the collection doesn't exist?

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5 participants