https://github.com/georgetaveras1231/easy_union_set

easily create unions and intersections in ActiveRecord.
https://github.com/georgetaveras1231/easy_union_set

Last synced: about 2 months ago
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easily create unions and intersections in ActiveRecord.

• Host: GitHub
• URL: https://github.com/georgetaveras1231/easy_union_set
• Owner: GeorgeTaveras1231
• License: mit
• Created: 2014-08-04T14:22:39.000Z (over 10 years ago)
• Default Branch: master
• Last Pushed: 2014-08-10T22:54:27.000Z (over 10 years ago)
• Last Synced: 2024-10-27T22:54:43.122Z (3 months ago)
• Language: Ruby
• Size: 516 KB
• Stars: 3
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: MIT-LICENSE

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README

        
[easy_union_set](https://rubygems.org/gems/easy_union_set)

==============

easily create unions and intersections in ActiveRecord.

Setup

```ruby

gem 'easy_union_set'

```

Easy to use, So I'll jump straight into the examples

to create a UNION

```ruby

Project.where("title LIKE '%a%'") | Project.having("LENGTH(description) > 10").group(:id)

# => SELECT "projects".* FROM ( SELECT "projects".* FROM "projects"  WHERE (title LIKE '%a%') UNION SELECT "projects".* FROM "projects"  GROUP BY id HAVING LENGTH(description) > 10 ) "projects"

```

to create an INTERSECT

```ruby

Project.where("title LIKE '%a%'") & Project.having("LENGTH(description) > 10").group(:id)

# => SELECT "projects".* FROM ( SELECT "projects".* FROM "projects"  WHERE (title LIKE '%a%') INTERSECT SELECT "projects".* FROM "projects"  GROUP BY id HAVING LENGTH(description) > 10 ) "projects"

```

to create a UNION ALL

```ruby

Project.where("title LIKE '%a%'") | {:all => Project.having("LENGTH(description) > 10").group(:id)}

# => SELECT "projects".* FROM ( SELECT "projects".* FROM "projects"  WHERE (title LIKE '%a%') UNION ALL SELECT "projects".* FROM "projects"  GROUP BY id HAVING LENGTH(description) > 10 ) "projects"

```

if for some reason you'd still rather make multiple queries and make a ruby union simply call #to_a on the AR:Relation object before using the #& or #| methods.