ActiveRecord OR query Hash notation

Question

I know there are 3 main notations for supplying arguments to the where ActiveRecord method:

1. Pure String
2. Array
3. Hash

Specifying and for the where method is straight forward:

# Pure String notation
Person.where("name = 'Neil' AND age = 27")

# Array notation
Person.where(["name = ? AND age = ?", 'Neil', 27])

# Hash notation
Person.where({name: "Neil", age: 27})

Specifying or for this same where method is stumping me for the hash syntax. Is it possible?

# Pure String notation
Person.where("name = 'Neil' OR age = 27")

# Array notation
Person.where(["name = ? OR age = ?", 'Neil', 27])

# Hash notation DOESN'T WORK
Person.where({name: "Neil" OR age: 27})

Answer 1

There are 5 options that could be considered as implementations of «Hash notation» (the last two are kinda hash-ish):

1. With Ruby on Rails 5 you are able to do the following chaining using ActiveRecord::Relation#or method:

   Person.where(name: 'Neil').or(Person.where(age: 27))
   

2. Use where_values together with reduce. The unscoped method is necessary only for Rails 4.1+ to ensure default_scope is not included in the where_values. Otherwise predicates from both default_scope and where would be chained with the or operator:

   Person.where( 
     Person.unscoped.where(name: ['Neil'], age: [27]).where_values.reduce(:or) 
   )
   

3. Install third-party plugins that implement these or similar features, for example:

   • Where Or (backport of the Ruby on Rails 5 .or feature mentioned above)

   • Squeel

     Person.where{(name == 'Neil') | (age == 27)} 
     

   • RailsOr

     Person.where(name: 'Neil').or(age: 27)
     

   • ActiverecordAnyOf

     Person.where.anyof(name: 'Neil', age: 27)
     

   • SmartTuple

     Person.where(
       (SmartTuple.new(' or ') << {name: 'Neil', age: 27}).compile
     )
     

4. Use Arel:

   Person.where( 
     Person.arel_table[:name].eq('Neil').or(
       Person.arel_table[:age].eq(27)
     ) 
   )
   

5. Use prepared statements with named parameters:

   Person.where('name = :name or age = :age', name: 'Neil', age: 27)