Pluck In Rails 5

Before rails 5 when pluck was called it used to query database even if the activerecord collection is queried before. Rails 5 has improved the way query was done on database when pluck was called on a model. Pluck directly returns array of the attribute that we pass to it.

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The pluck method was first introduced in rails 3 2.

Pluck in rails 5. In addition to apneadiving s answer pluck can take both single and multiple column names as argument. A quick duckduckgo search or a glance at the docs will explain how to use it and the performance benefits that come along with doing so. This means better performance for a large or often running query. Pluck can used more freely in rails with the rails 5 release.

Pluck in ror is used to get array of particular attribute based on particular condition from database. It also selects only those attributes while querying. Rails 3 2 4 2 5 0 5 1 5 2 6 0. Gem install pluck all.

Pluck name. According to rails guides pluck directly converts a database result into an array without constructing activerecord objects. Gem pluck all and then execute. If you have a rails 3 project and want to pluck not only one column feel free to use this gem and no need to worry about upgrading to rails 4 5 6 in the future will break this.

Ruby 2 2 2 7. Thus extra loop to get ids from the collection of activerecord is saved while using the pluck method. Add this line to your application s gemfile. Pluck column names public use pluck as a shortcut to select one or more attributes without loading a bunch of records just to grab the attributes you want.

Bundle or install it yourself as. If you only require a few attributes from a table rather than instantiating a collection of models and then running a map over them to get the data you need it s much more efficient to use pluck to pull back only the attributes you need as an array. While pluck is not exactly the new kid on the rails block these days it is still new to someone out there and even the experienced plucker might pick up a less obvious trick towards the end. Thus rails retrieved array of attribute values instead of array of activerecord.

Why use pluck in ruby on rails.