public class Foo {
#NotNull
#Pattern(regexp = "[0-9]+"
private String number;
}
Have requirement to support negative number at production site. Is there a way we can change regex value or disabling validation without changing the source class? any configuration to add in xml?
I know we can edit regex but looking for option without editing source file.
Spring uses regex validation, so you can simply tweak the regex pattern like this:
public class Foo {
#NotNull
#Pattern(regexp = "-?[0-9]+")
private String number;
}
However, if you mean about parameterizing the pattern, then you can use a property like this:
public class Foo {
#NotNull
#Pattern(regexp = "${regex.pattern}")
private String number;
}
And add in application.properties the property
regex.pattern=-?[0-9]+
Related
i'm trying to do a validation of only positive numbers inside the request in spring boot
Public ResponseEntity getId(#RequestParam(value =“idPer”)#Pattern(regexp=“^[0-9]*$”),message = “the value is negative”)
#NotNull(message = “the value is empty ”) Long idPer){
}
in my exceptionhandler I get this exception
no validator could be found for constraint 'javax.validation.constraints.pattern' validatingtype long
I have the #validated above my controller class
what am I doing wrong?
Check documentation of #Pattern. It is applicable to CharSequence i.e. String bur not allowed for Long which is what you are using in your method.
You may refactor your code like this:
public ResponseEntity getId (
#Pattern(regexp="^[0-9]+$", message="the value must be positive integer")
#RequestParam("idPer") final String idPerStr) {
Long idPer = Long.valueOf(idPerStr);
// rest of your handler here
}
Also note that #NotNull is not required because we are using + quantifiers that allows only 1 or more digits in pattern.
I'm trying to use the "RegularExpression" DataAnnotation validaiton in my model. My problem is even for the valid input I provide for the field containing the validation, the regex doesn't match and it fails.
I try to test the same valid input with the regex in a stand-alone console app and I find it gets through.
My point is, when regex is being used in dataannotation as validation, it considers all input as bad input. What am I missing here?
My regex is for checking comma-seperated email IDs. Here is my model:
public partial class BuildModel
{
public Int64 ConfigID { get; set; }
[Required(ErrorMessage = "Please select a stream!")]
public String Name{ get; set; }
[RegularExpression(#"^(([a-zA-Z0-9_\-\.]+)#((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)(\s*(;|,)\s*|\s*$))", ErrorMessage = "Please enter valid email IDs separated by commas")]
public string EmailIDs { get; set; }
public bool IsActive { get; set; }
}
Note: The "Required" data-annotation validation works just fine. It is just the Regex one, that won't work!
As far as i understand you just have problem within your Regex.
To validate emails separated by comma you can use this regex:
^( *[\w+-.%]+#[\w-.]+\.[A-Za-z]{2,4}( *, *)? *)+$
Check in in here.
You must the jquery.validate.min.js and jquery.validate.unobtrusive.min.js in your page without these libraries required annotation would not works.
I am trying to split this code in VB.net (owner_id) this is the data string.
yt.setConfig('DISTILLER_CONFIG', {"signin_url": "https:\/\/accounts.google.com\/ServiceLogin?hl=da\u0026continue=http%3A%2F%2Fwww.youtube.com%2Fsignin%3Faction_handle_signin%3Dtrue%26app%3Ddesktop%26feature%3Dcomments%26hl%3Dda%26next%3D%252Fall_comments%253Fv%253DZNW_uQaYfB0\u0026uilel=3\u0026passive=true\u0026service=youtube", "host_override": "https:\/\/plus.googleapis.com", "query": "http:\/\/www.youtube.com\/watch?v=ZNW_uQaYfB0", "channel_id": "UCe4LM_eKc9ywRmVuBm5pjQg", "first_time_comment_promo": false, "privacy_setting": "PUBLIC", "visible": true, "pinned_activity": null, "page_size": 100, "owner_id": "e4LM_eKc9ywRmVuBm5pjQg", "reauth": false, "video_id": "ZNW_uQaYfB0"});
So far I have tried this code, but it doesn't work. Already declared the owner_id string..
owner_id = (Split(data, """owner_id"": """)(1).Split("""")(0)
But it does not work.
EDIT:
How can I select the JSON into a string that I want to split from these scripts..?
http://pastebin.com/50bxc83T
This is JSON, string splitting it is not a great idea, but rather you should de-serialize the JSON into a class object using Json.NET, like this:
Public Class DistillerConfigResults
Public Property DISTILLER_CONFIG As DistillerConfig
End Class
Public Class DistillerConfig
Public Property signin_url As String
Public Property host_override As String
Public Property query As String
Public Property signin_url As String
Public Property channel_id As String
Public Property first_time_comment_promo As Boolean
Public Property privacy_setting As String
Public Property visible As Boolean
Public Property pinned_activity As Object
Public Property page_size As Integer
Public Property owner_id As String
Public Property reauth As Boolean
Public Property video_id As String
End Class
Now you can actually deserialize the JSON into your class object, like this:
Dim a As DistillerConfigResults = JsonConvert.DeserializeObject(Of DistillerConfigResults)(jsonString)
I would suggest using Regex:
"owner_id": "([\d\w]*)"
but only if you really want to parse this single key/value pair. If more should be extracted I would rather think about extracting JSON and deserializing it in normal way.
Working example:
Dim regex As Regex = New Regex("""owner_id"": ""([\d\w]*)""")
Dim match As Match = regex.Match("...here your string...")
If match.Success Then
Console.WriteLine(match.Groups(1).Value)
End If
if there are multiple parts like yt.Config(...) you can include the desired one identifier into regular expression, for example:
Dim regex As Regex = New Regex("yt.setConfig\('DISTILLER_CONFIG'.*""owner_id"": ""([\d\w]*)""")
I am trying to learn MVC4 and i've come to this chapter called validation.
I came to know about DataAnnotations and they have pretty neat attributes to do some server side validation. In book they have only explained about [Required] and [Datatype] attribute. However in asp.net website i saw something called ScaffoldColumn and RegularExpression.
Can someone explain what they are, even though I know little what RegularExpression does.
Also are there any other important validation attributes I should know?
Scaffold Column dictates if when adding a view based on that datamodel it should/not scaffold the column. So forexample your model's id field is a good candidate for you to specify ScaffoldColumn(false), and other foreign key fields etc.
I you specify a regular expression, then if you scaffold a new view for that model,edit customer for example, a regex or regular expression on field will enforce that entered data must match that format.
You can read about ScaffoldColumnAttribute Class here
[MetadataType(typeof(ProductMetadata))]
public partial class Product
{
}
public class ProductMetadata
{
[ScaffoldColumn(true)]
public object ProductID;
[ScaffoldColumn(false)]
public object ThumbnailPhotoFileName;
}
And about RegularExpressionAttribute Class you can read here.
using System;
using System.Web.DynamicData;
using System.ComponentModel.DataAnnotations;
[MetadataType(typeof(CustomerMetaData))]
public partial class Customer
{
}
public class CustomerMetaData
{
// Allow up to 40 uppercase and lowercase
// characters. Use custom error.
[RegularExpression(#"^[a-zA-Z''-'\s]{1,40}$",
ErrorMessage = "Characters are not allowed.")]
public object FirstName;
// Allow up to 40 uppercase and lowercase
// characters. Use standard error.
[RegularExpression(#"^[a-zA-Z''-'\s]{1,40}$")]
public object LastName;
}
We manage several ASP.NET MVC client web sites, which all use a data annotation like the following to validate customer email addresses (I haven't included the regex here, for readability):
[Required(ErrorMessage="Email is required")]
[RegularExpression(#"MYREGEX", ErrorMessage = "Email address is not valid")]
public string Email { get; set; }
What I would like to do is to centralise this regular expression, so that if we make a change to it, all of the sites immediately pick it up and we don't have to manually change it in each one.
The problem is that the regex argument of the data annotation must be a constant, so I cannot assign a value I've retrieved from a config file or database at runtime (which was my first thought).
Can anyone help me with a clever solution to this—or failing that, an alternative approach which will work to achieve the same goal? Or does this just require us to write a specialist custom validation attribute which will accept non-constant values?
The easiest way is to write a custom ValidationAttribute that inherits from RegularExpressionAttribute, so something like:
public class EmailAttribute : RegularExpressionAttribute
{
public EmailAttribute()
: base(GetRegex())
{ }
private static string GetRegex()
{
// TODO: Go off and get your RegEx here
return #"^[\w-]+(\.[\w-]+)*#([a-z0-9-]+(\.[a-z0-9-]+)*?\.[a-z]{2,6}|(\d{1,3}\.){3}\d{1,3})(:\d{4})?$";
}
}
That way, you still maintain use of the built in Regex validation but you can customise it. You'd just simply use it like:
[Email(ErrorMessage = "Please use a valid email address")]
Lastly, to get to client side validation to work, you would simply add the following in your Application_Start method within Global.asax, to tell MVC to use the normal regular expression validation for this validator:
DataAnnotationsModelValidatorProvider.RegisterAdapter(typeof(EmailAttribute), typeof(RegularExpressionAttributeAdapter));
Checkout ScotGu's [Email] attribute (Step 4: Creating a Custom [Email] Validation Attribute).
Do you really want to put the regex in database/config file, or do you just want to centralise them? If you just want to put the regex together, you can just define and use constants like
public class ValidationRegularExpressions {
public const string Regex1 = "...";
public const string Regex2 = "...";
}
Maybe you want to manage the regexes in external files, you can write a MSBuild task to do the replacement when you build for production.
If you REALLY want to change the validation regex at runtime, define your own ValidationAttribute, like
[RegexByKey("MyKey", ErrorMessage = "Email address is not valid")]
public string Email { get; set; }
It's just a piece of code to write:
public class RegexByKeyAttribute : ValidationAttribute {
public RegexByKey(string key) {
...
}
// override some methods
public override bool IsValid(object value) {
...
}
}
Or even just:
public class RegexByKeyAttribute : RegularExpressionAttribute {
public RegexByKey(string key) : base(LoadRegex(key)) { }
// Be careful to cache the regex is this operation is expensive.
private static string LoadRegex(string key) { ... }
}
Hope it's helpful: http://msdn.microsoft.com/en-us/library/cc668224.aspx
Why not just write you own ValidationAttribute?
http://msdn.microsoft.com/en-us/library/system.componentmodel.dataannotations.validationattribute.aspx
Then you can configure that thing to pull the regex from a registry setting... config file... database... etc... etc..
How to: Customize Data Field Validation in the Data Model Using Custom