Append additional conditions to a query

I have a query where I need to add several conditions as an OR clause, because I want to use LIKE, so I can not use IN instead.

So how can I add multiple OR from an array?

The SQL should look like this:

SELECT * FROM TABLE where a like '%a%' OR a LIKE '%b%' OR a LIKE '%c%' ...

where ‘a’, ‘b’, ‘c’ is from an array.

dataset
   .where(column:, Sequel.like(:column, '%#{myarray.first}%'))

myarray.drop(1).each do |v|
    dataset.or(Sequel.like(:column, '%#{v}%'))
end

dataset.limit(100)

Answer

From the Rails API docs, the .or conditional query should be chained after a .where method.

dataset.where(column:, Sequel.like(:column, '%#{myarray.first}%'))
       .or(dataset.where(column:, Sequel.like(:column, '%#{myarray.second}%'))
       .or(dataset.where(column:, Sequel.like(:column, '%#{myarray.third}%'))

The full answer:

dataset = dataset.where(column:, Sequel.like(:column, '%#{myarray.first}%'))

myarray.drop(1).each do |v|
    dataset = dataset.or(dataset.where(column:, Sequel.like(:column, '%#{v}%'))
end

dataset.limit(100)

The same can be achieved without a gem (assuming Sequel.like is coming from this gem) in “vanilla” Rails.

dataset = dataset.where("column LIKE ?", '%#{myarray.first}%'))

myarray.drop(1).each do |v|
    dataset = dataset.or(dataset.where("column LIKE ?", '%#{v}%'))
end

dataset.limit(100)