akshay
Fri May 11 2018
Rails 5 prevents accidental halting of the callbacks. In order to explicitly halt, we can make use of
throw(:abort)
in the callback chain.akshay
Fri May 11 2018
Sidekiq by default does 25 retries (about 21 days) based on exponential back off formula ie. to retry multiple times with exponential delays. If need be, we can explicitly configure max_retries in sidekiq.yml.
mrinmoy
Mon May 07 2018
harshwardhan
Fri Apr 27 2018
while writing test for a parent component which renders child component based on some state/prop and if your child component is connected, always import unconnected child component and do assertion on that.
/code
import { ChildComponent } from 'path/to/component';
expect(component.find(ChildComponent).length).toBe(1);
//instead of
expect(component.find('ChildComponent').length).toBe(1);
/code
import { ChildComponent } from 'path/to/component';
expect(component.find(ChildComponent).length).toBe(1);
//instead of
expect(component.find('ChildComponent').length).toBe(1);
akshay
Mon Apr 23 2018
In Rails we can do two modes of locking that is 'Optimistic Locking' and 'Pessimistic locking'. 'Optimistic Locking' assumes that a database transaction conflict is very rare to happen and such locked records can still be read (Shared lock). It uses a version number of the record to track the changes. This can be used by adding a lock_version column to the table and then is handled automatically by Rails.
Whereas 'Pessimistic locking' assumes that database transaction conflict is very likely to happen. It locks the record until the transaction is done (Exclusive lock). This can be done with ActiveRecord::Base#lock! or ActiveRecord::Locking::Pessimistic#with_lock.
Whereas 'Pessimistic locking' assumes that database transaction conflict is very likely to happen. It locks the record until the transaction is done (Exclusive lock). This can be done with ActiveRecord::Base#lock! or ActiveRecord::Locking::Pessimistic#with_lock.
mrinmoy
Fri Apr 20 2018
a decent spreadsheet writer gem for ruby, https://github.com/felixbuenemann/xlsxtream, ran some rough benchmarks, and this one is the fastest and lowest memory consuming gem. although not feature complete.
yuva
Fri Apr 20 2018
This is a good read about common Rails errors which rollbar has captured https://rollbar.com/blog/top-10-ruby-on-rails-errors/
mrinmoy
Mon Apr 16 2018
mrinmoy
Thu Apr 12 2018
row caching and stream: true option for mysql2 https://github.com/brianmario/mysql2#row-caching
mrinmoy
Tue Apr 10 2018
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