where(user: current_user) instead of where(user_id: current_user. AR understands relations in conditions.We can use associations on models to write less.When somebody unlikes the post, which cannot be found or which is not liked, we can just show the success. The destroy action can be a little more optimistic.In production environment find will raise an ActiveRecord::RecordNotFound exception (I'm assuming you're using AR) There is no need to check if Post was found.We can extract post lookup into a method or before hook.In the Like model I prevent duplicate likes with: validates :user_id, uniqueness: Our services include interlibrary delivery, shared catalog support, continuing education, consulting, shared e-book collections, cooperative purchasing, and more. They both check that the post exists first and then creates or destroys the like record containing the post id and user id and redirects to the post with a message depending on the outcome. We serve approximately 1300 academic, public, school, and special library agencies in northern and west-central Illinois. Redirect_to :alert => 'An error prevented you from unliking this post!' The problem is that a string with an ''' or an '&' in it doesn't get matched by ILIKE correctly. If = Like.where(user_id: current_user.id, post_id: :notice => 'Unliked!' Redirect_to :alert => 'An error prevented you from liking this post!' If = Like.new(user_id: current_user.id, post_id: :notice => 'Liked!' In SQL, % is a wildcard character.I have the following two methods which handle the liking and unliking of posts in my Rails application: def = Post.find(params) This finds all the titles that have the search text, provided by the params ( params), anywhere inside the title. Here’s an example: Book.where("title LIKE ?", "%" + params + "%") If you want to implement a search function, you may want to allow for a partial match.
RAILS ILIKE HOW TO
How to Search Inside Text With A Where LIKE Condition Where comments is the table name, and id is column name.
RAILS ILIKE FREE
With this query you get all the books, which have a comment, and the comment id is 2.įor the string version: Book.joins(:comments).where("comments.id = 2") Rails The Getty High Waist Wide Leg Jeans 148.50 (25 off) 198.00 Free Delivery New Rails Zoey Intarsia Stars Cotton & Cashmere Crewneck Sweater 238.00 Free Delivery New Markdown Rails Yolie Sleeveless Mock Neck Satin Blouse 55.20 (60 off) 138.00 ( 3) Free Delivery Rails Hunter Plaid Shirt 168. This returns books that match both category & author.Īnd you can combine where with a scope. Like this: Book.where(category: "Ruby", author: "Jesus Castello") This returns all the books with a category of “Ruby”. Here’s a query: Book.where(category: "Ruby") You may want to find out all the books by a specific author, or all the books filed under a particular category.
Given a Book model, with title, author & category. cars cars.joins (:manufacturers).where ('manufacturers.name ILIKE ', params :manufacturer.gsub (/-/, ' ')) params :manufacturer comes through in a form of a string that has been. The purpose of using where is to build a query that filters the information in your database, so you only get the rows you want. We’re going to take a look at the different ways you can use where in your Rails applications. If you’re expecting one record (a specific user), use find_by, for multiple records (a list of users) use where.īut where has many ways to use it, which often confuses beginners.
0 kommentar(er)
