All Questions
Tagged with model validation
665
questions
110
votes
9
answers
111k
views
Rails: Validating min and max length of a string but allowing it to be blank
I have a field that I would like to validate. I want the field to be able to be left blank, but if a user is entering data I want it to be in a certain format. Currently I am using the below ...
- 6,433
106
votes
4
answers
69k
views
Rails "validates_uniqueness_of" Case Sensitivity
Here is the model (I am using SQLLite3):
class School < ActiveRecord::Base
validates_uniqueness_of :name
end
For example, after I add "Yale", I cannot add "Yale" but can add "yale." How can I ...
- 11.2k
96
votes
7
answers
103k
views
Raise a validation error in a model's save method in Django
I'm not sure how to properly raise a validation error in a model's save method and send back a clear message to the user.
Basically I want to know how each part of the "if" should end, the one where ...
- 5,715
77
votes
16
answers
59k
views
Rails before_validation strip whitespace best practices
I would like my User model to sanitize some input before before save. For now some simple whitespace stripping will do.
So to avoid people registering with "Harry " and pretend to be "Harry", for ...
- 27.3k
65
votes
4
answers
122k
views
Email model validation with DataAnnotations and DataType
I have following model:
public class FormularModel
{
[Required]
public string Position { get; set; }
[Required]
[DataType(DataType.EmailAddress)]
public string Email { get; set; }
...
- 777
65
votes
1
answer
14k
views
Is it bad practice to include non-validating methods in a pydantic model?
I'm using pydantic 1.3 to validate models for an API I am writing.
Is it common/good practice to include arbitrary methods in a class that inherits from pydantic.BaseModel?
I need some helper methods ...
- 653
58
votes
3
answers
78k
views
Ruby on Rails: errors.add_to_base vs. errors.add
I have read that errors.add_to_base should be used for errors associated with the object and not a specific attribute. I am having trouble conceptualizing what this means. Could someone provide an ...
- 18.9k
57
votes
6
answers
38k
views
How do you validate uniqueness of a pair of ids in Ruby on Rails?
Suppose the following DB migration in Ruby:
create_table :question_votes do |t|
t.integer :user_id
t.integer :question_id
t.integer :vote
t.timestamps
end
Suppose ...
- 20.6k
51
votes
5
answers
42k
views
How to add boolean required attribute in mvc?
I have one model class like:
public class Student
{
[DataType(DataType.Date)]
[DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}", ApplyFormatInEditMode = true)]
[Display(Name = "...
- 2,652
51
votes
3
answers
51k
views
Rails model validation on create and update only
If I want to have validation only on create, then I can do
validates_presence_of :password, :on => :create
But how do I say on create and update? I tried this but it didn't work:
...
- 86.4k
47
votes
4
answers
107k
views
Check if laravel model got saved or query got executed
I've seen alot of people using this way to check if a laravel model got saved. So now I wonder if it is a safe way.
And also can I check if the queries bellow got executed like this
Check if model ...
- 8,495
43
votes
6
answers
8k
views
Ruby on Rails: Is it better to validate in the model or the database?
Is it generally better practice (and why) to validate attributes in the model or in the database definition?
For (a trivial) example:
In the user model:
validates_presence_of :name
versus in the ...
- 18.2k
40
votes
3
answers
25k
views
Rails Internationalization (I18n) in model validations: Possible or not?
I have the following validation in a model:
validates_inclusion_of :whatever, :in => [true, false], :message => I18n.t('please_select_whatever')
It seems that the translation does not work in ...
- 3,908
37
votes
4
answers
17k
views
What is the Rails3 version of errors.add_to_base?
I want to write a custom validation in Rails 3, but following this example I get:
'ActiveModel::DeprecatedErrorMethods.add_to_base' call is deprecated in Rails 3.0
What is the rails3 version of:
...
- 18.1k
36
votes
4
answers
20k
views
Required Attribute on Generic List Property
Is it possible to put a [Required] attribute onto a List<> property?
I bind to a generic list on POST and was wondering if I could make ModelState.IsValid() fail if the property has 0 items in it?
- 1,698
36
votes
1
answer
6k
views
Best approach to model validation in PHP? [closed]
I've learned that there are often many ways to solve one programming problem, each approach typically having its own benefits and negative side affects.
What I'm trying to determine today is the best ...
- 18.7k
34
votes
3
answers
28k
views
rails validate in model that value is inside array
I have a form where i pass a field named :type and i want to check if it's value is inside an array of allowed types so that no one is allowed to post not-allowed types.
the array looks like
@...
- 5,778
34
votes
10
answers
22k
views
How do I validate that two values do not equal each other in a Rails model?
I have a User model, which has an email and a password field. For security, these may not be equal to each other. How can I define this in my model?
user142019
34
votes
4
answers
32k
views
Kohana 3: Example of model with validation
I find examples and tutorials about models and about validation. And I places that say the validation (or most of it at least) should be in the model, which I agree with. But I can't any examples or ...
- 155k
33
votes
6
answers
14k
views
Rails: how to require at least one field not to be blank
I know I can require a field by adding validates_presence_of :field to the model. However, how do I require at least one field to be mandatory, while not requiring any particular field?
thanks in ...
- 12.6k
31
votes
2
answers
14k
views
Rails put validation in a module mixin?
Some validations are repetitive in my models:
validates :name, :length => { :minimum => 2 }, :presence => true, :uniqueness => true
validates :name_seo, :length => { :minimum => 2 },...
- 4,401
27
votes
5
answers
47k
views
attribute dependent on another field
In a model of my ASP.NET MVC application I would like validate a textbox as required only if a specific checkbox is checked.
Something like
public bool retired {get, set};
[RequiredIf("retired",...
- 271
24
votes
4
answers
20k
views
Rails - How to validate a field only if a another field has a certain value?
In my form I have a Select with three values: Apple, Banana and Cherry. If I choose Apple from the select I hide another Select- and a Text-field with some Javascript, because when Apple is chosen, ...
- 658
23
votes
7
answers
10k
views
Rails: validate presence of parent_id in has_many association
I have a projects resource that has many tasks. I want to ensure that every task has a project_id by adding validates_presence_of :project_id to the tasks model.
However, when creating a new project ...
- 12.6k
23
votes
2
answers
15k
views
Yii: validation rules that always apply except one scenario
I know that you can have a validation rule that applies only for one scenario:
array('username', 'exist', 'on' => 'update'),
Now i would like to know if it's possible to do the opposite: a rule ...
- 8,900
22
votes
2
answers
14k
views
Ruby on Rails: How to validate a model without Active Record?
I'm currently trying to validate fields without having an ActiveRecord::Base inheritance.
My model stores the data on a cache server so I do not need ActiveRecord.
Anyway, I would like to validate the ...
- 8,360
20
votes
4
answers
24k
views
Cannot skip validation in Rails 3?
I'm working on a project in Rails 3 where I need to create an empty record, save it to the database without validation (because it's empty), and then allow the users to edit this record in order to ...
- 42.8k
19
votes
2
answers
16k
views
Smarter paperclip validations
I'm using paperclip in a rails app and have the following three validations in my model
validates_attachment_presence :photo
validates_attachment_size :photo, :less_than=>1....
- 34.4k
19
votes
1
answer
23k
views
How to use full_clean() for data validation before saving in Django 1.5 gracefully?
I think Django's model validation is a little inconvenient for those models that don't use built-in ModelForm, though not knowing why.
Firstly, full_clean() needs called manually.
Note that ...
- 893
18
votes
3
answers
9k
views
Is there a way to transparently perform validation on SQLAlchemy objects?
Is there a way to perform validation on an object after (or as) the properties are set but before the session is committed?
For instance, I have a domain model Device that has a mac property. I would ...
- 4,568
18
votes
3
answers
22k
views
Rails validation from controller
There is a contact page, which offers to enter name, telephone, email and message, after that it sends to an administrator's email. There is no reason to store message in DB.
Question. How to:
Use ...
- 363
17
votes
5
answers
28k
views
Check user's age with laravel validation rules
How can I check the age of a user upon registration? I want to set the minimum age to be 13 years old. I ask for the user's date of birth and when I validate the other credentials, I want to check ...
- 4,332
17
votes
6
answers
11k
views
Rails 3 validate uniqueness of one value against a column?
I have a model with an active column, which is a boolean. I want to validate the uniqueness of all newly added records against company_id, such that I can add as many records as I want with the same ...
- 20.2k
16
votes
4
answers
16k
views
Rails form validation conditional bypass
I have a rails model that validates uniqueness of 2 form values. If these 2 values aren't unique the validation errors are shows and the "submit" button is changed to "resubmit". I want to allow a ...
- 3,822
16
votes
3
answers
16k
views
Rails Validation for users email - only want it to validate when a user signs up or updates email address
I have a User model with the usual attributes such as email and hashed_password etc. I want to write a validation that checks for the presence of an email address but only when
1) there isn't one ...
- 4,212
15
votes
3
answers
15k
views
Conditionally Require Only One Field In Django Model Form
Anyway to make a field conditionally required based on whether or not another field in the same form has been filled out?
If field1 has no data, but field2 does
form is valid.
If field1 has no ...
- 3,493
15
votes
2
answers
12k
views
cakephp one form, multiple models, not displaying one model's validation messages
I have a registration form and I am creating a record in both User and Identity tables (a user hasMany identities)
the form looks like this
<?php echo $this->Form->create('User');?>
&...
- 1,241
15
votes
4
answers
21k
views
data validation for SQLAlchemy declarative models
I'm using CherryPy, Mako templates, and SQLAlchemy in a web app. I'm coming from a Ruby on Rails background and I'm trying to set up some data validation for my models. I can't figure out the best ...
- 31.4k
14
votes
2
answers
3k
views
Rails 3 - validating one of two fields has been completed
I'm writing a Rails app to manage a series of banners along the top of our website; each one should link either to a URL provided by the editor, or a specific product selected from a drop-down list.
...
- 491
14
votes
2
answers
7k
views
Display errors using Knockout JS + MVC + Server-side Model Validation?
Html form is controlled using Knockout JS and jQuery templates.
Basic jQuery validation is in use to validate fields.
Form gets serialized to JSON and submitted to MVC controller action using AJAX.
...
- 443
12
votes
9
answers
25k
views
Yii form model validation- either one is required
I have two fields on the form ( forgotpassword form ) username and email Id . User should enter one of them . I mean to retrieve the password user can enter user name or the email id . Could some ...
- 1,717
12
votes
3
answers
25k
views
ModelState.IsValid or Model.IsValid?
I'm writing a controller and unit tests for it, when I came across two ways (equally valid I think) to do something. All my models have an IsValid property, which I can check to ask the model if it's ...
- 8,532
11
votes
4
answers
8k
views
validates_presence_of + :message shows the name of the field
I'm creating a Rails app, and I have a model called User. In this model I have a boolean value called isagirl. A user must specify if it is a girl or not, which is done by two radio buttons. In my ...
user142019
10
votes
7
answers
38k
views
Disable Model Validation in Asp.Net MVC
How do I disable Model validation for a single Action in a Controller ?
Or can I do it per model by registering the model type at startup somewhere ?
I want the ModelBinder to bind to the model, but ...
- 5,949
10
votes
3
answers
3k
views
Two columns must not equal each other in Rails
I'm creating a social network in Rails and I have a model like this:
create_table "friendships", :force => true do |t|
t.integer "user1_id"
t.integer "user2_id"
t.boolean "...
user142019
9
votes
2
answers
6k
views
Why do we no longer need to manually validate models in higher versions of ASP.NET Core?
All my models are automatically validated before hitting the endpoint, and return appropriate errors if some form of validation has failed.
I remember back in ASP.NET Core 2.2 we needed to manually ...
- 2,494
9
votes
1
answer
4k
views
Yii2: Prevent empty string in attribute of ActiverRecord
What's the best way to prevent that an empty string gets inserted into a field of an MySQL's InnoDB table? Allowed values are strings with more than zero characters or NULL.
I'm asking that because ...
- 9,518
9
votes
2
answers
6k
views
Using a ASP .NET MVC model value to validate another model value?
I have a model class like this:
public class SomeClass
{
public int EmployeeId {get;set;}
public int DayTotal {get;set}
}
For this model class I am creating a custom ValidationAttribute for ...
- 14.5k
8
votes
6
answers
12k
views
How do I display a user friendly error when Spring is unable to validate a model's java.util.Date field?
I'm using Spring 3.1.2.RELEASE. I want to display an error message on my JSP if my date field isn't formatted properly. I thought I'd followed all the right steps. I binder a converter in my ...
- 16.4k
8
votes
1
answer
5k
views
Can multiple values be used in a model validator in Django?
I've got a model using a validation class called CompareDates for my model validators and I want to pass the validator two field values. However I'm unsure of how to use multiple field values in a ...
- 12.6k