I have this code
I have these options and if the user select anything except 'British Columbia'
to give him error message that the province have to 'British Columbia'
I believe it will solve by using the model validation
<%= f.label :province ,"Province (required)"%><br>
<%= f.select(:province, [["Select One", ""],'Alberta','British Columbia','Manitoba','New Brunswick','Newfoundland and Labrador','Nova Scotia','Northwest Territories','Nunavut','Ontario','Prince Edward Island','Quebec','Saskatchewan','Yukon'], {}) %>
User.rb
validates :province, presence: "British Columbia"
You shouldn't use presence, it's the wrong validation. You should use inclusion:
validates :province, inclusion: { in: %w[British Columbia] }
You realize this is a nonsensical problem, right? What's the point of offering several alternatives in the view if the validation will only accept one?
Related
I am trying to do a server side validation in Rails 5 and I am having issues. I'm still very much a noob but this has me stumped.
I want to check to see if any of the 4 checkbox options have been ticked on saving.
In my form I have:
<%= f.input :property_type, label: 'List as', as: :check_boxes, collection: %w(Student Graduate Professional Family), checked: property.property_type %>
And I have tried
validates :property_type, acceptance: { message: 'must be selected' } and validates :property_type, presence: true neither have worked.
I've also tried to create a custom validation but I could not get that to work either.
Can anyone please help?
Custom validation should work in your case. could you please check with below snippet?
validates : property_type_is_selected
private
def property_type_is_selected
if self.property_type.blank?
self.errors.add(:property_type, 'must be selected.')
end
end
I have a form and I have made some inputs required. After submitting the form that value will be sent to an API. I know that the validations are put into model file but since I do not have a database, how can I use the rails validation?
Right now I am validating the code inside a controller using if else.
if !params[:groups][:name].blank? && !params[:groups][:make].blank? && !params[:groups][:model].blank? && !params[:groups][:firmware].blank?
This does the work but it is not very elegant.
Take a look at ActiveModel, it lets you do "model things" without the database. There were some limitations that made me not use it in the end (I think related to associations) but for simple stuff it's great (and it's a part of how ActiveRecord works.
Example code from docs
class Person
include ActiveModel::Model
attr_accessor :name, :age
validates :name, :age, presence: true
end
this is easy. On the form input fields that you NEED, add required: true For example:
<%= form.for #something do |f| %>
<%= f.text_field :title, placeholder: 'Title', required: true %>
<% end %>
The user gets an error if the required fields are not filled out correctlty.
Is this what you mean?
Justin
EDIT
I guess I would look at using the gem
client_side_validations
Let us know how you go
i have this form
= simple_form_for #category.fields.build, url: category_fields_path(#category) do |f|
= f.input :kind, collection: Field::FIELD_TYPES, prompt: "Choose field type"
= f.input :description
= f.submit "Add field"
and this field model
class Field < ActiveRecord::Base
FIELD_TYPES = %w(integer float date string text)
validates :description, presence: true
validates :kind, presence: true
belongs_to :category
end
when i leave 'description' field empty, no request is send and i get notice 'Please fill out this field'. which is what i want. on the other hand, when description is filled in but kind is not, a request is still send to the 'create' action! No field gets created, but 'description' needs to be filled in again. there should be no request in such situation. any idea how to fix this?
Though, I don't have exact answer to Your problem, but You should start with checking HTML output. Simple from relies on HTML5 to provide front-end validation. All inputs should have required attribute, to have validation enabled. Maybe there is a bug, and in this particular case simple_form does not output required attribute.
Another thing to take in account as it is HTML5, consult browser support: http://caniuse.com/#feat=form-validation . Theoretically it's possible that You are testing on browser that has limited support for form validations.
If You discover that simple_from did not output required for Your kind fuel, try forcing it:
= f.input :kind, collection: Field::FIELD_TYPES, prompt: "Choose field type", required: true
I got my answer at Simple Form github's issue topichere. to sum up, problem was prompt, validation is not (yet?) working with it correctly, solution is to replace it, eg like this:
= f.input :kind, collection: Field::FIELD_TYPES, include_blank: "Choose field type", label: false
I have a form that I want to validate if an option has been selected.
I do not want to accept the default starting option, "Please Select a Product"
I using this now and get a uninitialized contant error. I believe I am writing the syntax wrong.
Controller:
validates :product_name, :presence => { :unless => (product_name = "Please Select a Product")}
View:
<span class="span5 pagination-right">
<%= f.label "Product" %>
<%= f.select :product_name, options_for_select([ ["Please Select a Product"] ]) %>
</span>
How am I supposed to have the option written?
Thank you
The product_name is changed like this:
<script>
$(document).ready(function() {
$('#ticket_product_name').html("<option>Please Select a Product</option>");
$('#ticket_firmware_version_string').html("<option>Please Select a Firmware</option>");
$('#category').change(function(){
$('#ticket_product_name').html("<option>Please Select a Product</option>");
$('#ticket_firmware_version_string').html("<option>Please Select a Firmware</option>");
if ($('#category').val() == "blah")
{
$('#ticket_product_name').append("<option>blah</option>");
$('#ticket_product_name').append("<option>blah</option>");
}
else if ($('#category').val() == "another category")
{
$('#ticket_product_name').append("<option>blah product</option>");
}
until end of options, end script.
I think what you are looking for is a placeholder for this select. In this case, I used a disabled option:
<% options = options_for_select(["Select an option", ["Product #1",1], ["Product #2",2]], disabled: "Select an option") %>
<%= f.select :product_name, options %>
You should use include_blank from the select helper, like this:
<%= f.select :product_name, options_for_select([["opt1",1],["opt2",2]]), include_blank: true %>
and then, on model
validates :product_name, :presence => true
#MrYoshiji commented something truthful in my answer - if you are not allowing it to be blank, the easy way is simply not add a blank option in the select
I would recommend to use the :prompt option for your select helper (the documentation on this isn't quite straight forwward, but it's ok in this version of the same thing: http://apidock.com/rails/ActionView/Helpers/FormTagHelper/select_tag). This allows you to define a helper string of text to encourage the user to select an option, but will submit a nil value back when the form is submitted.
<%= f.select :product_name, PRODUCT_NAME_OPTIONS, prompt: 'Select an option' %>
The next thing I'd recommend is... instead of validating presence of on the model, do a validates_inclusion_of. This way you can define the set of options in the model and then use that same set of options in the select helper, above, as well is in your validation. This way you know the form wasn't manipulated to include a different option and it actually keeps things a bit DRYer.
Product
PRODUCT_NAME_OPTIONS = {'opt 1' => 'opt1', 'opt 2' => 'opt2'}
validates_inclusion_of :product_name, :in => PRODUCT_NAME_OPTIONS.values, :message => 'choose from the available options'
Instead of making this too complicated, I just added a length validation since the default is much longer then the product names. Simple is best, however there should be a string validator option.
validates :product_name, presence: true, length: {
maximum: 21,
too_long: ": Must select a product"
}
I'm using the simple_form gem. I want to customize the error message displayed when a user fails validations. How can I accomplish this?
You can declare the content of the
error message in your model:
validates_length_of :name, :minimum => 5, :message => "blah blah blah"
You can set id or class for your
error tag:
<%= f.input :name, :error_html => { :id => "name_error"} %>
Then you can use CSS for the styling.
And you can use
<%= f.error :name, :id => "name_error" %>
and you'll get
<span class="error" id="name_error">is too short (minimum is 5 characters)</span>
I dont know if it is any different for simple_form gem.
For content of error messages to be changed, you can use the :message attribute in the model.
class User < ActiveRecord::Base
validates :email, {:presence => true, :message => "is not filled up."}
end
Now the validation message will be Email is not filled up. If you want the field name also to be changed(Email to E-mail address something like that ), the approach now is to define it in locales.rb file like this
# config/locales/en.yml
en:
activerecord:
attributes:
user:
email: "E-mail address"
See link for details on locales. Another approach is to define in the model, humanized attributes like this:
class User < ActiveRecord::Base
validates :email, {:presence => true, :message => "is not filled up."}
HUMANIZED_ATTRIBUTES = {
:email => "E-mail address",
...(other fields and their humanized names)
...
}
def self.human_attribute_name(attr, options={})
HUMANIZED_ATTRIBUTES[attr.to_sym] || super
end
end
For customizing style of validation message we will have to edit the style for
#errorExplanation and .fieldWithErrors,in the scaffold.css stylesheet.
You can easily change the default error message comes in the translation file, which is found in config/locales/simple_form.en.yml.
In the specific initializer, config/initializers/simple_form.rb you can overrule the default options how the html is generated.
Hope this helps.
For completeness, I would like to add that formtastic is an easier choice to start with, because it has a default layout. I like simple_form a lot, but it does not offer any formatting out of the box, but that is their intention. With Formtastic it is very hard (impossible) to change the generated html, and with simple_form can you can completely mold the generated html to your liking. This is especially useful if you have a designer, and the forms you generate have to generate the same html. So if you are getting started, formtastic will give you nicer-looking results quicker. Also note that it is quite easy to switch, because the syntax is almost identical.
There is another solution explained here that wasn't mentioned in the answers. You can directly override the error messages from the views, in the form itself. For example:
<%= f.input :last_name,
placeholder: 'last_name',
error: 'This is a custom error message',
required: true,
class: 'form-field',
autofocus: true,
input_html: { autocomplete: "last_name" } %>
It is however not advised as it is not DRY, you would need to override it in every field.