Recent questions tagged ruby

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ruby on rails - Form submitted twice, due to :remote=>true

My form submitted twice, after double checked, it was cause by ':remote=>true'. I removed it, my project works well. ... ="Add"> </p> </form> See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ruby on rails - Fast way to get remote image dimensions

I'm using the imagesize gem to check the sizes of remote images and then only push images that are big enough ... and faster ways to do this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ruby - Why does accessing a SSL site with Mechanize on Windows fail, but on Mac work?

This is the code I'm using to connect to the SSL site. require 'mechanize' a = Mechanize.new page = a. ... only getting this error on Windows ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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882 views

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ruby on rails - PG::DuplicateTable: ERROR: relation "posts" already exists

When I run rake db:migrate I get following output: == 20141219011612 CreatePost: migrating ================== ... file I don't have post table. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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464 views

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ruby on rails - schema.sql not creating even after setting schema_format = :sql

I want to create schema.sql instead of schema.rb. After googling around I found that it can be done by ... am missing or assuming wrong ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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654 views

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ruby on rails - How to Show Error Messages Next to Field

I have a form with input fields/labels etc. How do I get the error message to show up next to the field? instead ... .each do |msg| %li = msg See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ruby on rails - How to implement a singleton model

I have a site in rails and want to have site-wide settings. One part of my app can notify the admin by SMS ... use that? What should I do here? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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659 views

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ruby on rails - How do I check whether a value in a string is an IP address

when I do this ip = request.env["REMOTE_ADDR"] I get the client's IP address it it. But what if I want to ... .. EDIT What about IPv6 IP's?? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ruby on rails - Make blank params[] nil

When a user submits a form and leaves certain fields blank, they get saved as blank in the DB. I would like to ... " c = nil end end Thanks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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712 views

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ruby on rails - Array Merge (Union)

I have two array I need to merge, and using the Union (|) operator is PAINFULLY slow.. are there any ... Union operator appears to take forever See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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859 views

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ruby on rails - How to get the latest record from each group in ActiveRecord?

In my Ruby on Rails application I have a database structure like this: Project.create(:group => "1", :date ... this. Thanks for any help. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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536 views

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ruby on rails - HABTM Relationship -- How Can I Find A Record Based On An Attribute Of The Associated Model

I have setup this HABTM relationship in the past and it has worked before....Now it isn't and I'm at ... 'm definitely going bald from this lol See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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618 views

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ruby - Can bundler show me which gems in Gemfile have newer versions (eg. dry-run of bundle update)

Is there a way to run bundle update in pretend mode, similar to the -p (pretend) flag for Rails generators or cap's - ... : ... list of gems ... See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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594 views

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ruby - Sum 2 hashes attributes with the same key

I have 2 hashes, for example: {'a' => 30, 'b' => 14} {'a' => 4, 'b' => 23, 'c' => 7} where a, b and c are ... {'a' => 34, 'b' => 37, 'c' => 7} See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.0k views

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ruby on rails - Devise Remember Me and Sessions

I'm confused with the devise gem config settings: # The time the user will be remembered without asking for ... I'm missing something here. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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526 views

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ruby - put haml tags inside link_to helper

is it possible to add html-content inside a link_to helper in HAML? i tried this, but all i get is a syntax error ... ="icon">Arrow</span></a> See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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746 views

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ruby on rails - Why is my RSpec not loading Devise::Test::ControllerHelpers?

I'm using Rails 5, and Devise 3.5.1. Going through a nice (older) book about creating/testing an API, ... project What did I miss here? Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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685 views

1 answer

ruby on rails - How do :default => 0 and :null => false differ for integer fields in migrations?

If I use a migration to update a database, and I add an integer field like this: t.integer :foo :default ... the difference between the two... See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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640 views

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ruby on rails - Displaying a Carrierwave filename in the view

I am trying to display the filename of a Carrierwave attachment in a Rails erb template. The following does ... %w(pdf) end end See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.0k views

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ruby on rails - Passing headers and query params in HTTparty

How to pass query params and headers in post method using HTTparty. I am doing as follows But it throws ... header.rb:164:in `each_capitalized' See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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537 views

1 answer

ruby on rails 3 - image_tag in mailer not using asset_host

image_tag isn't using the asset_host I've set. Any ideas why? The only thing I can think of is it having to ... will be showing up in an email. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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456 views

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ruby - I have a gem installed but require 'gemname' does not work. Why?

The question I'm really asking is why require does not take the name of the gem. Also, In the case ... require 'rubygems' require 'memcache' See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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458 views

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ruby - How to check if a variable is a number or a string?

How to check if a variable is a number or a string in Ruby? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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572 views

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ruby on rails - Implementing bootstrap theme from wrapbootstrap

I've downloaded a theme through wrapbootstrap but cannot figure out how to implement it. I assumed it was ... this bootstrap theme? Thank you See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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485 views

1 answer

ruby - Rails - ActionView::Base.field_error_proc moving up the DOM tree?

Is there anyway to go up the DOM tree from the html_tag element passed in? ActionView::Base.field_error_proc = ... , read the solutions below. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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465 views

1 answer

ruby on rails - Is There A Faster Way To Pull Production Data From Heroku Than Taps?

I often need to clone production data to investigate bugs. Even with a trivial database size heroku db:pull ... would also be appreciated. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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664 views

1 answer

ruby on rails - Can I check whether a Stripe customer already has a specific card before adding a new one?

I have saved stripe customer id's in my db for later payments. A customer will have multiple cards and I would ... it will create a new card. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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585 views

1 answer

ruby on rails - "Warm Up Cache" on deployment

I am wondering if anyone has any plugins or capistrano recipes that will "pre-heat" the page cache for a ... priority) does it already exist? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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