Knowledge base for teams
How to detect time-overlapping-records in Postgres + RailsPublic
```ruby Model .where("TSRANGE(?, ?, '()') && TSRANGE(starts_at, ends_at, '()')", starts_at, ends_at) .where.not(id: record_id) .exists? ``` Bot...
@ownadiRails ERD diagram visualisation onlinePublic
Manual: 1. Go to https://dbdiagram.io/d 2. Click *import* and choose *Import from Rails (schema.rb)* 3. Paste schema.rb content 4. voilà
How to deal with RSpec time precision errorPublic
In some cases, Ruby uses higher precision to represent time than the DB. When we compare a timestamp before and after saving to the DB it might not be equal.
Rails migration decimal precision scalePublic
Rails migration decimal precision scale explained quasi visually ``` 123.45678912345 <- scale -> <- precision -> ```
How to use helper methods in mailer templatesPublic
How to use helper methods in mailer templates? Instead of this "include YourHelper" use this "add_template_helper YourHelper" in YourMailer
Example tmux script for RailsPublic
Shell script that will start a tmux session with Rails console and server in side panes
Compiling ES6 syntax with Uglifier onPublic
When you try to compile ES6 syntax with Uglifier gem initialized you get this error: ``` Uglifier::Error: (...) To use ES6 syntax, harmony mode must be e...
Brakeman - An awesome gem that scans your app against vulnerabilities.Public
To use Brakeman, the only thing is to install the gem: ``` $ gem install brakeman ``` and then run the single command in Rails application's root dir...
Define routes for external links in railsPublic
You can define external urls in routes.rb instead of creating helpers manually
How to drop a production database in Rails 5Public
I encountered a problem when dropping a production database. Here's the solution
Make RSpec shared examples easier to understand with this one trick!Public
This guy makes his shared examples easier to understand. Overpaid consultants hate him!
When to use let, let! and before in RSpecPublic
When to use let, let! and before in RSpec.
