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How do I improve this email address validation method?

I have a form called sub_form with 2 inputs, one of the inputs is an email address, the other is a choice from a dropdown menu. The Javascript below checks if the email address is valid, and also prints the values of both the inputs to the console log.
The problem is, when an incorrect email is entered, it shows the error message but still prints to the console.
How can I fix this so that the inputs only print to console if a valid email is entered?
<!-- validator -->
$('#sub_form').bootstrapValidator({live: 'disabled',
fields: {
email: {
validators: {
emailAddress: {
message: 'Invalid email' } }},}});
<!--print to console-->
document.getElementById('sub_form').onsubmit = function(){
console.log(document.getElementById('email').value);
console.log(document.getElementById('dropdown').value);
return false;
}

Per my comment on the question, this validation library as far as I've been able to tell is an older version of the one here. My company happens to use the same one, so I've been using that site a lot for reference. Just replace mentions of the "formValidation" method with "bootstrapValidator", and events use the "bv" namespace instead of "fv".
The validator should provide some methods for checking its valid state. You could use:
var validator = $('#sub_form').data('bootstrapValidator');
if (validator.isValidField('email')) {
console.log(document.getElementById('email').value);
}
See here for more info.

Sequelize: Change "validate" meta data of column

Is it possible to change the "validate" meta data of a column using a migration file? I tried the queryInterface.changeColumn method and it seems like it can only change the three meta data mentioned in the docs (defaultValue, allowNull, and type).
I've tried doing something like this inside the 'up' object of the migration file:
queryInterface.changeColumn(
'tableName',
'columnName',
{
validate: {
is: /new_regex_validation/
}
}
)
However, the above attempt did not work for me when I ran "sequelize db:migrate"
For simplicity's sake, I'll use a table definition to elaborate on my question:
I'm trying to change an already existing table like this:
var tableName = sequelize.define('tableName', {
columnName: {
type: DataTypes.STRING,
unique: true,
allowNull: false,
validate: {
is: /some_regex_validation/
}
}
})
into this using sequelize migration:
var tableName = sequelize.define('tableName', {
columnName: {
type: DataTypes.STRING,
unique: true,
allowNull: false,
validate: {
is: /a_new-or-different_regex_validation/
}
}
})
or simply remove the validate meta data while using sequelize migration:
var tableName = sequelize.define('tableName', {
columnName: {
type: DataTypes.STRING,
unique: true,
allowNull: false
}
})
Any ideas?

Validation happens on the client, not on the database. You don't need a migration for it.

I came across this question a few times trying to understand the difference between building my model with validations and using migrations.
I found this link very helpful. Hopefully someone else does in the future.
Difference between Validations and Constraints
Validations are checks performed in the Sequelize level, in pure
JavaScript. They can be arbitrarily complex if you provide a custom
validator function, or can be one of the built-in validators offered
by Sequelize. If a validation fails, no SQL query will be sent to the
database at all.
On the other hand, constraints are rules defined at SQL level. The
most basic example of constraint is an Unique Constraint. If a
constraint check fails, an error will be thrown by the database and
Sequelize will forward this error to JavaScript (in this example,
throwing a SequelizeUniqueConstraintError). Note that in this case,
the SQL query was performed, unlike the case for validations.
https://sequelize.org/master/manual/validations-and-constraints.html

JQuery Validation Plugin Remote Validation Error always fires [duplicate]

This question already has answers here:
jQuery Validate remote method usage to check if username already exists
(2 answers)
Closed 8 years ago.
On my home page I have a log in modal that asks for the users email address and password through a basic form. When the email address is entered I have a remote validation that checks to see if the email address is in my blacklisted table in my DB. But the remote error fires off no matter if the PHP returns false or true and will not let the form submit, even if the PHP returns true. All of the validation works correct except for the remote. I can not seem to fix this problem and I have looked all over and nothing I find can solve this problem.
Home jQuery
$(function(){
$("#frmSignIn").validate({
rules: {
InputEmailAddress: {
required: true,
email: true,
remote:"scripts/blacklist.php"
},
InputPassword: {
required: true,
minlength: 3,
maxlength: 20
}
},
messages: {
InputEmailAddress:{
required:"Don't forget your email address!",
email:"Please enter a valid email address",
remote:"This email address has been backlisted"
},
InputPassword:{
required:"Please enter your password",
minlength:"Password must be longer than 3 characters",
maxlength:"Password can not be longet than 20 characters"
}
},
submitHandler: function(){
var data = $("#frmSignIn").serialize();
$.post('posted.php', data, function(o){
console.log(o);
},'json');
}
});
});
PHP
I will add the actual table check after I get this working
$email = $_GET['InputEmailAddress'];
$valid = true;
echo json_encode($valid);

The problem was that remote:'scripts/blacklist.php' was in single ''
Soon as I changed it to double quotes "scripts/blacklist.php" it works fine...
If anyone knows why I would love to know so I can understand, but problem solved!

Are there any Mongoose validation libraries?

I am new to mongoDB and mongoose in fact I am new to Javascript as a whole. As a result of this I'm not sure of how I should go about sanitizing my data.
I was wondering if there are any libraries with custom validation functions that take care of at least some generic dangers one should watch out for. Also it would be nice if it already had commonly used validation such as email, or character length.

Hi there are many libraries for mongoose schema validation.some of are listed below.
https://github.com/leepowellcouk/mongoose-validator,
https://github.com/SamVerschueren/node-mongoose-validator
both are good library for mongoose validation..Also mongoose provide custom logic for validation.
More if you want to create custom logic then https://github.com/chriso/validator.js helpful to you.
for email validation i use this
const emailRegex = /^\w+([\.-]?\w+)*#\w+([\.-]?\w+)*(\.\w{2,3})+$/
email: {
type: String,
trim: true,
unique: true,
required: 'Email address is required',
validate: {
validator: (email)=> {
return emailRegex.test(email)
},
message: '{VALUE} is not a valid email'
},
match: [emailRegex, 'Please fill a valid email address']
}

backbone validate single attribute in save only

I have one model with 2 attributes. Let me explain first.
Backbone.Model.extend({
validation: {
username: [
{required: true, msg: 'Enter email/username.'},
],
password: [
{required: true,msg: 'Enter password.'},
{minLength:20,msg: 'Incorrect password length.'}]
},
});
I want validate single attribute in save function. Do you have any idea?
means, If my username & password field is blank, then error should be occurred for username only.
I am using backbone.validation with backbone.
Thanks

To validate a single or multiple properties, using Backbone.Validation, use the following code:
yourModel.isValid('username') // or
yourModel.isValid([ 'attribute1', 'attribute2' ])

There are two approaches you might use:
Approach 1
I think the easiest way to do this would be that you don't set the password field until after the username is validated. To quote from the FAQ:
What gets validated when?
If you are using Backbone v0.9.1 or later, all attributes in a model will be validated. However, if for instance name never has been set (either explicitly or with a default value) that attribute will not be validated before it gets set.
This is very useful when validating forms as they are populated, since you don't want to alert the user about errors in input not yet entered.
If you need to validate entire model (both attributes that has been set or not) you can call validate() or isValid(true) on the model.
So, don't call validate on your whole model. Call it on the username field first, then the password field.
Also, don't set the password field in your model until after the username has been validated.
Approach 2
Another approach would be to use the conditional validation described in the FAQ:
Do you support conditional validation?
Yes, well, sort of. You can have conditional validation by specifying the required validator as a function.
So, your code might look something like:
Backbone.Model.extend({
validation: {
username: [
{required: true, msg: 'Enter email/username.'},
],
password: [
{required: function(val, attr, username) {
return Bool(username); //some code here- return true if username is set, false if it is not. This rough example may not work in the real world.
},msg: 'Enter password.'},
{minLength:20,msg: 'Incorrect password length.'}]
},
});
I'm pretty sure that's what Ulugbek Komilovich is suggesting, though I'm not sure the syntax in that answer is quite correct.

M = Backbone.Model.extend({
validation: {
username: [
{required: true, msg: 'Enter email/username.'},
],
password: function(value, attr, computedState) {
// new M(this.get('username')); //or use second way
if(this.get('username')) {
return 'Enter email/username.';
}
// other checks
}
},
});