rails-activerecord Archives

Suppose I have the following two objects: first_name_relation = User.where(:first_name => 'Tobias') # ActiveRecord::Relation last_name_relation = User.where(:last_name => 'Fünke') # ActiveRecord::Relation is it ...

June 2, 2022
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Programming, ruby-on-rails

IT Nursery

Check if a table exists in Rails

I have a rake task that won’t work unless a table exists. I’m working with more than 20 engineers on a website so ...

June 2, 2022
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Programming, ruby-on-rails

IT Nursery

ActiveRecord OR query

How do you do an OR query in Rails 3 ActiveRecord. All the examples I find just have AND queries. Edit: OR method ...

June 1, 2022
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Programming, ruby-on-rails

IT Nursery

Rails ActiveRecord date between

I need to query comments made in one day. The field is part of the standard timestamps, is created_at. The selected date is ...

May 31, 2022
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Programming, ruby-on-rails

IT Nursery

Validate uniqueness of multiple columns

Is there a rails-way way to validate that an actual record is unique and not just a column? For example, a friendship model ...

May 31, 2022
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Programming, ruby-on-rails-3

IT Nursery

Understanding :source option of has_one/has_many through of Rails

Please help me in understanding the :source option of has_one/has_many :through association. The Rails API explanation makes very little sense to me. “Specifies ...

May 30, 2022
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Programming, ruby-on-rails

IT Nursery

Rails – Nested includes on Active Records?

I have a list of events that I fetch. I’m trying to include every user associated to this event and every profile associated ...

May 30, 2022
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ActiveRecord: size vs count

In Rails, you can find the number of records using both Model.size and Model.count. If you’re dealing with more complex queries is there ...

May 26, 2022
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