form-validator-node v1.1.0
A simple node module for validating request parameters and objects.
This module supports custom error messages.
Installation
$ npm install form-validator-node
Usage
A simple example showing object validation.
var validator = require("form-validator-node");
var userInfoValidations = {
firstName: "type: string | required:true | minlength:3 | maxlength: 40 | pattern:/^[A-Za-z0-9]*$/",
lastName: "type: string | minlength:1 | maxlength: 40 | pattern:/^[A-Za-z0-9]*$/",
userName: "type: string | required:true | minlength:6 | maxlength:30 | pattern:/^[A-Za-z0-9_]*$/",
age: "required:true | type:number | minvalue:13 | maxvalue:70",
}
var userObject = {
firstName: "daniel",
lastName: "radcliffe",
userName: "DanJRadcliffeNL",
age: 30
}
var options = {};
validator(userInfoValidations, userObject,options,function(validationErrors, verifiedData){
if(validationErrors)
{
console.log(validationErrors);
}
})
A simple express example showing login form validation.
var validator = require("form-validator-node");
app.post("/login",function(req,res){
var loginFormValidations = {
userName: "required:true | minlength:6 | maxlength:30",
password: "minlength:6 | maxlength:50"
}
var options = {};
validator(loginFormValidations, req.body,options,function(validationErrors, verifiedData){
if(validationErrors)
{
res.send(400).send(validationErrors);
}
})
})
A simple express example showing login form validation using promises.
var validator = require("form-validator-node");
app.post("/login",function(req,res){
var loginFormValidations = {
userName: "required:true | minlength:6 | maxlength:30",
password: "minlength:6 | maxlength:50"
}
var options = {};
validator(loginFormValidations,req.body,options).then(verifiedData=>{
console.log(verifiedData);
}).catch(validationErrors => {
res.send(400).send(validationErrors);
})
})
A simple express example showing login form validation with custom error messages.
var validator = require("form-validator-node");
app.post("/login",function(req,res){
var loginFormValidations = {
userName: `required:true:Username is a mandatory field, Please fill out the field. |
minlength:6:userName length should be atleast 6 characters. |
maxlength:30:userName lenght exceeds 30 characters.`,
password: "minlength:6 | maxlength:50"
}
var options = { deleteOtherFields : true }; // Options object will be explained in below sections.
validator(loginFormValidations, req.body,options,function(validationErrors, verifiedData){
if(validationErrors)
{
res.send(400).send(validationErrors);
}
})
})
Options
deleteOtherFields
Returns only fields in validation object if "deleteOtherFields" value is true. Else returns all fields. Default value is true.
Available Validations
required: true : <optional error message>
Value in the object must exist for given field.
type: <string | number | boolean | list>: <optional error message>
Value in the object must be the given type.
minvalue: <number>: <optional error message>
This will be used for number data types.Field value in the object should not be lower than the specified value.
maxvalue: <number>: <optional error message>
This will be used for number data types.Field value in the object should not be greater than the specified value.
minlength: <number>: <optional error message>
Length of the field value in the object should not be lower than the specified value.
maxlength: <number>: <optional error message>
Length of the field value in the object should not be greater than the specified value.
pattern: <regex>: <optional error message>
Field value must follow given pattern.
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