ruby-on-rails-4

问题 I have a method in my Post model that looks like this: def self.num_posted_x_days_ago(n) start_date = Time.now.midnight - n.day end_date = Time.now.midnight - (n+1).day where(created_at: start_date..end_date).count end When I run it in IRB, I get this: > Post.num_posted_x_days_ago(8) (0.3ms) SELECT COUNT(*) FROM "posts" WHERE ("posts"."created_at" BETWEEN '2015-02-27 05:00:00.000000' AND '2015-02-26 05:00:00.000000') => 0 Note that the Time on the date is 05:00:00.000000 for both the start

问题 I have a method in my Post model that looks like this: def self.num_posted_x_days_ago(n) start_date = Time.now.midnight - n.day end_date = Time.now.midnight - (n+1).day where(created_at: start_date..end_date).count end When I run it in IRB, I get this: > Post.num_posted_x_days_ago(8) (0.3ms) SELECT COUNT(*) FROM "posts" WHERE ("posts"."created_at" BETWEEN '2015-02-27 05:00:00.000000' AND '2015-02-26 05:00:00.000000') => 0 Note that the Time on the date is 05:00:00.000000 for both the start

问题 I have a form with 10 attributes. Among them I have 4 attributes which I need to apply what I'd call a"mutually conditional presence" Active Record validation. I want that (A) if one at least is present, then the other 3 must be present (B) still allow none to be present (if the other 3 are blank, then the fourth has the right be be blank) Here are the four attributes: address_line_1 zipcode state country It means that if the user fills ONE of them then ALL the others have to be present. But

问题 I have a form with 10 attributes. Among them I have 4 attributes which I need to apply what I'd call a"mutually conditional presence" Active Record validation. I want that (A) if one at least is present, then the other 3 must be present (B) still allow none to be present (if the other 3 are blank, then the fourth has the right be be blank) Here are the four attributes: address_line_1 zipcode state country It means that if the user fills ONE of them then ALL the others have to be present. But

问题 I am using mailboxer in my Rails 4 app. gem 'mailboxer' I recently updated it from 0.11 to 0.12.4 , it stopped working, and I cant figure out why. Now, I am getting the error: uninitialized constant Message I checked the gem's GitHub repo and it does have the Message model. I checked my local version of the gem and it matches up. Puma:mailboxer Jeff$ pwd /Users/Jeff/.rvm/gems/ruby-2.0.0-p247/gems/mailboxer-0.12.4/app/models/mailboxer Puma:mailboxer Jeff$ ls conversation conversation.rb

问题 In my Rails 4 app, I implemented a custom validator named LinkValidator on my Post model: class LinkValidator < ActiveModel::Validator def validate(record) if record.format == "Link" if extract_link(record.copy).blank? record.errors[:copy] << 'Please make sure the copy of this post includes a link.' end end end end Everything works fine, except that currently, the message displayed is: 1 error prohibited this post from being saved: Copy Please make sure the copy of this post includes a link.

问题 I have a database with a table called addresses. I want to add a geometry field. I could do it in pgAdmin, but not sure how it would play with Rails. I think sql would be: ALTER TABLE addresses ADD geom geometry(Point,4326) Then I will want to run UPDATE addresses SET geom = ST_SetSRID(ST_MakePoint(longitude,latitude),4326); Can I do that in Rails or must I do it in pgAdmin (or psql)? Thanks. Newbie getting lost in the complications of mashing several applications. 回答1: Are you using this gem

问题 An Organization model has a 1:many association with a User model. I have the following validation in my User model file: belongs_to :organization validates_presence_of :organization_id, :unless => 'usertype==1' If usertype is 1, it means the user will have no organization associated to it. For a different usertype the presence of an organization_id should be mandatory. The organization model includes: has_many :users accepts_nested_attributes_for :users, :reject_if => :all_blank, :allow

问题 I'm learning Rails, and I would like to use simple_form. I'm creating a simple app (my first one), and I want to create a signup form. I used rails g scaffold User username:string password:string to create my model and controller. I'm using Foundation gem too, if that's matter, and I install simple_form with the right command for Foundation. I've been looking for answers for two hours, I tried many things, I have no idea of what's wrong with my code. ## app/views/home/index.html.erb ## <%=

问题 Trying to create a user from a json request but my server gives me "typeError (no implicit conversion of Symbol into Integer)". I understand that it's something wrong with my nested attribute but i dont know what, this's driving me crazy.. My Javascript file: user = { email: @get('email') first_name: @get('firstName') last_name: @get('lastName') password: @get('password') password_confirmation: @get('passwordConfirmation') registration_completed: true authentications_attributes: { provider: