I am new with rails and I am trying to register my user's names without special characters and spaces but allowing the - symbol.
Example :
##Pierre! => invalid
Pierre-Louis => valid
Pierre Louis => invalid
In the User.rb file I have :
class User < ApplicationRecord
...
validates :first_name, presence: true, length: {maximum: 25}, format: {with: Regexp.new('[^0-9A-Za-z-]')}
...
I don't have any error message and I'm still able to register using special characters.
Also, I'd like to add an error message if the name isn't validated.
Do you have any leads ?
Any help would be much appreciated !
When you validate format with regex, you need to ensure you match the whole string that is being validated. In order to do that your regex needs to start with \A and end with \z that are anchors marking beginning and ending of the string.
In your case:
validates :first_name,
presence: true,
length: {maximum: 25},
format: {with: /\A[-0-9A-Za-z]\z'/}
message: "Custom message"
assuming you accept numbers, small and big letters and a minus sign.
Related
I have a field email in my database also call emails that should have this format : 123456789#pac.gmail.com where 123456789 should be numbers and a length of 9.
In my model, I tried to format this for my user with the following code :
class Email < ApplicationRecord
EMAIL_PATTERN = /^[0-9]+/#pac.gmail.com
LENGTH = 9
validates :email, presence: true, format: EMAIL_PATTERN, length: LENGTH
end
But with that I have an error unexpected tIVAR, expecting end but I don't get why should I have a END in my code as I don't start any loop or something,
Is anyone knows how to format the email in the right way and why I have this kind of error ?
There is no need to separately check the length; you can do that from within your regex. If I'm understanding correctly, you want to make sure there are 9 digits followed by #pac.gmail.com. You can do it like this:
class Email < ApplicationRecord
EMAIL_PATTERN = /\A[0-9]{9}#pac.gmail.com\z/
validates :email, presence: true, format: EMAIL_PATTERN
end
I am new to rails and in my models am doing some field validation and i need some help
has_many :stats
validates :name, presence: true, uniqueness: true, length: { minimum: 2 }
validates :age, presence: true
validates :title, presence: true, format: { with: ???????????????
message: "must begin with abc_ and have numbers after" }
I am stuck trying to validate title to be in the format abc_8943578945794
Is this where I should really create a method to validate?
Thanks, Nigel.
Apparently you're looking for a regular expression to match the title, try this:
with: /^[a-z]+_[0-9]+$/
Fernando Almeida's anwers is right, you need a regex to match the expected value, but for the format that "OP" have passed (abc_8943578945794), this seems more suitable:
/^[a-z]{3}_[0-9]{13}$/
The only thing that I'm doing more than his, is setting the number of digits (3) and characters (13) that the string should have.
I would use the following regexp:
with: /\Aabc_\d+\z/
Explanation:
\A # beginning of the string
abc_ # string prefix you are looking for
\d+ # one or more digits
\z # end of the string
I want to validate a Nickname but I have a lot of format like this:
validates :nickname, presence: true, unniqueness: true, format: { with: /\A[a-zA-Z0-9]+\Z/ }, format: { without: /\s/ }, format: { without: /[!-\/\#\^\~\`\(\)\[\]\>\<\=]/ }
warning: key :format is duplicated and overwritten on line 38
warning: key :format is duplicated and overwritten on line 38
Obviously down't work in this way, how can I solve it? Thank you
Your first regex covers everything:
format: { with: /\A[a-zA-Z0-9]+\Z/ }
but you probably want \z instead of \Z to avoid issues with trailing newlines. Anything that matches /\A[a-zA-Z0-9]+\z/ won't contain any space characters so the /\s/ test is already covered, similarly for the punctuation test.
Also, you've misspelled uniqueness as unniqueness so you'll want to fix that too.
That would leave you with just:
validates :nickname, presence: true, uniqueness: true, format: { with: /\A[a-zA-Z0-9]+\Z/ }
If you really did have multiple regexes to test then you could do it in a custom method:
validate :nickname_format
def nickname_format
return if(!nickname) # The `presence: true` takes care of complaining about this.
if(nickname ~! ...)
errors.add(:nickname, 'blah blah')
elsif(...)
...
end
end
so that you could check each regex individually.
Is it a good idea to having validates like this:
validates :serialnumber, presence: true, length: {7..20}, format: {with: /\d{7,20/}
As you see it generates three errors if I don't type serialnumber.
I would like to see only one error.
If I type nothing, I would like to see 'serial number is required' only.
If I type 123ABC I would like to see 'wrong length' only
And if I type 123-ABC-123 I would like to see 'wrong format' only
How to do it?
Regards
You could split it into 2 validators, check if this would work
validates :serialnumber, presence: true
validates :serialnumber, length: {7..20}, format: { with: /\d{7,20}/ }, allow_blank: true
As I understand then you want to see only one error message at a time. If that's the case then custom validation method might help. For ex.
validate :serial_number_validation_one_by_one
private
def serial_number_validation_one_by_one
if !self.serial_number.present?
errors.add(:serial_number, "must be present!")
elsif self.serial_number.length < 7 || self.serial_number.length > 20
errors.add(:serial_number, "must have length between 7 and 20!")
elsif self.serial_number.match(<your regex pattern here>)
errors.add(:serial_number, "must be properly formatted!")
end
end
Keep in mind that custom validation methods are called by validate not by validates.
Making a simple Ruby on Rails app as practise that requires a user to sign up.
Everything works well until I implement regex validation on a 'profile_name' field
Here's my 'user' model:
validates :profile_name, presence: true,
uniqueness: true,
format: {
with: /^a-zA-Z0-9_-$/,
message: 'Must be formatted correctly.'
}
And yet the profile name 'jon' simply refuses to pass. Where could this error be coming from, other than my 'user' model?
You need to add brackets around the ranges so that the regex matches "any of the range" rather than "all of the range in order". Put a + on the end to allow it to match anything in the range more than once.
You also need to change your beginning and ending of lines to beginning and ending of strings!
validates :profile_name, presence: true,
uniqueness: true,
format: {
with: /\A[a-zA-Z0-9_-]+\z/,
message: 'Must be formatted correctly.'
}
Details:
\A # Beginning of a string (not a line!)
\z # End of a string
[...] # match anything within the brackets
+ # match the preceding element one or more times
Really useful resource for generating and checking regex: http://www.myezapp.com/apps/dev/regexp/show.ws
Try like this , It is working fine
validates :name, presence: true,
uniqueness: true,
format: {
with: /\A[a-zA-Z0-9_-$]+\z/,
message: 'Must be formatted correctly.'
}
I just tested your regular expression in Rubular with the 'jon'. There is no matching.
I am not optimized regular expression coder. But still the below regular expression works.
/^[a-zA-Z0-9_-]+$/
So try
validates :name, presence: true,
uniqueness: true,
format: {
with: /^[a-zA-Z0-9_-]+$/,
message: 'Must be formatted correctly.'
}