Katharina Irrgang c93f03b87e ✨ post update collision detection (#8328) (#8362) ... closes #5599 If two users edit the same post, it can happen that they override each others content or post settings. With this change this won't happen anymore. ✨ Update collision for posts - add a new bookshelf plugin to detect these changes - use the `changed` object of bookshelf -> we don't have to create our own diff - compare client and server updated_at field - run editing posts in a transaction (see comments in code base) 🙀 update collision for tags - `updateTags` for adding posts on `onCreated` - happens after the post was inserted --> it's "okay" to attach the tags afterwards on insert --> there is no need to add collision for inserting data --> it's very hard to move the updateTags call to `onCreating`, because the `updateTags` function queries the database to look up the affected post - `updateTags` while editing posts on `onSaving` - all operations run in a transactions and are rolled back if something get's rejected - Post model edit: if we push a transaction from outside, take this one ✨ introduce options.forUpdate - if two queries happening in a transaction we have to signalise knex/mysql that we select for an update - otherwise the following case happens: >> you fetch posts for an update >> a user requests comes in and updates the post (e.g. sets title to "X") >> you update the fetched posts, title would get overriden to the old one use options.forUpdate and protect internal post updates: model listeners - use a transaction for listener updates - signalise forUpdate - write a complex test use options.forUpdate and protect internal post updates: scheduling - publish endpoint runs in a transaction - add complex test - @TODO: right now scheduling api uses posts api, therefor we had to extend the options for api's >> allowed to pass transactions through it >> but these are only allowed if defined from outside {opts: [...]} >> so i think this is fine and not dirty >> will wait for opinions >> alternatively we have to re-write the scheduling endpoint to use the models directly		2017-04-19 14:53:23 +01:00
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listeners_spec.js	✨ post update collision detection (#8328) (#8362)	2017-04-19 14:53:23 +01:00