awesome_nested_set | An awesome replacement for acts_as_nested_set and better_nested_set | Frontend Utils library

How about this solution with invoking serializer on children? Be careful to not get into infinite loop with deep nesting

Try this:

Actually the problem was that i developed it on windows and was deploying to ubuntu. So the native gems were not being installed. when i added the required platforms in the gemfile and ran bundle install the app was working fine

It's not really the migration that fails but redmine's initialization. As such, you will not be able to start redmine at all.

The cause is probably because of changes to the all method with rails 4 (although I haven't been able to spot the exact change). But what that plugin does is trying to define an alias for the all method and that method does not exist (any more).

As the last change to the plugin repository was two years ago, you are probably out of luck when trying to migrate the plugin along unless you want to step up and maintain the plugin/issue a PR to the repo yourself.

You could extend the idea of the counter_cache manually for a sort of sum_cache, lets call it nested_ads_count.

Then there would be 4 general cases that need to be handled

• a category gets a new add
• a category is "Moved/added" to a new parent category"
• a category gets deleted (or removed from a parent)"

An after_update callback that updates the parent's nested_ads_count when either the current's nested_ads_count or ads_count updates. solves the first case.

awesome_nested_set solves the other 2 cases

using an after_add and after_remove callbacks recalculate the nested_ads_count.

The method to calculate and cache the nested_ads_count would look like this

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