Questions tagged as 'ruby-on-rails'

Tagged questions
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Error installing gem pg

I'm having this error while running bundle install    "An error occurred while installing pg (0.21.0), and Bundler can not continue.   Make sure that 'gem install pg -v' 0.21.0 '' succeeds before bundling.   In Gemfile: " This is th...
asked by 05.12.2017 / 01:53
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Ruby on Rails - Upload files

I currently have a requirement to allow the user to upload PDF and DOCX files in my size limiting application. How can I develop this functionality using Rails? Physical files will be saved to the AWS cloud, and I just want to keep the file i...
asked by 13.01.2018 / 11:39
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Symbols in rails

After creating a template in rails can you change the created symbol? For example I created a template called transaction, rails creates in the plural transactions but would like to change that name for transactions is possible?     
asked by 29.09.2017 / 02:18
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Can modifying Rails default primary keys cause a problem?

By default, Rails generates the id field for all my tables, and I'd like to know if it might generate an error in the future if I change the name and type of the key. I ask this because I realized that Rails has some naming conventions that shou...
asked by 05.09.2017 / 01:01
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Show User Logged in rails_admin dashboard

Good afternoon everyone, I am developing a project in rails 5 using devise, cancancan and rails_admin, what happens is the following, I created some types of users, among them I mention admin users (has full manager permission on cancancan), and...
asked by 06.10.2017 / 18:23
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Rails. Uncaught ReferenceError: jQuery is not defined

I'm implementing a portion of notifications in a rails project, from a tutorial and I'm getting this error. Uncaught ReferenceError: jQuery is not defined at notifications.self-3e6330e4ab7198d8dee61da361c9c6cd1a536fd445b9ce4b6792ea023705a...
asked by 31.08.2017 / 17:46
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Testing in RSpec failing because of DatabaseCleaner

I was having trouble with tests about 4 days ago. At first I had a problem with "database is locked" and the file where DatabaseCleaner is configured; I changed two lines that used :transaction to :truncation and solved th...
asked by 21.08.2017 / 15:30
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Filter result of a collection_select based on the selection of another

I need to filter the result of neighborhoods based on the selection of a city. I have a has_many relation through the active record. Is it possible to perform this filter without submitting? In models: class Cidade < ApplicationRecord...
asked by 09.09.2017 / 20:12
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Questions about relationships in Rails "field must exists"

Good morning, I started to study rails recently and whenever I define the relationships between the entities in my database, some doubts arise. The first time, I created and defined relationships in migrations. I did this: class CreatePr...
asked by 27.07.2017 / 15:42
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In-page rendering

I'm new to rails and I'm having difficulty with RENDER I have a "_tables-client" rendering inside the page and when I order to execute a method, I want to update only the specific render and not the entire page,     
asked by 19.07.2017 / 19:18