validation - Angular 4 bind HTTP response to typescript model -


i have angular 4 page gets inputs user. have validation on individual controls. on submit want server validations (essentially rechecking validations) , return errors array field name, true or false , error if failed.

i these errors map controls on page , show errors. using reactive forms , server response use same name form control.

example, control name 'name'. after submit response name invalid. show , error message under control. mvc when upon submit errors shown next each control.

is possible , how go generating generic binding used forms.

    yes, quite simple in angular. here example how so.      1. html file.      <form [formgroup]="saveform"  (ngsubmit)="savedata()" >         <div>             <label>name</label>             <input  id="name"  type="text" class="form-control" formcontrolname="name" tabindex="1">         </div>         <div *ngif="errror" >             <p>{{errormsg}}</p>         </div>          <button type="submit" id="btnsave" >save</button>     </form>  2.in component ts. a. defined formgroup & error message variable.   saveform :formgroup;   errror :boolean = false ;   errormsg :any; b. initialize form group. (you can defined client side validation here using angular validator)   this.saveform = this.fb.group({      name: ['']   }); c. on save data method need set error bit true. savedata() {     let data = this.saveform .value.name;     this._userservice.save(data)  // calling service here.       .subscribe(         (response :any )=> {           console.log(response);           }         },         (error :any ) => {           this.error = true;  this.errormsg = error.error; // assigning server side errro variable.         }         );    }  that's done.

Comments

Post a Comment

Popular posts from this blog

php - Vagrant up error - Uncaught Reflection Exception: Class DOMDocument does not exist -

i've set bento/ubuntu-16.04 vagrant box using php 5.6, , getting following error quite few times when try , run shell script: "uncaught reflection exception: class domdocument not exist". i've tried adding following top of script (not together), each no success: "sudo apt-get install php5.6-xml", "sudo apt-get install php5-xml", "sudo apt-get install php-dom" i've tried resetting server "sudo service apache2 restart". does have suggestions?
Read more

vue.js - Create hooks for automated testing -

Image
qa guys complained can't automate frontend testing. because our html looks same outside. lazy hack did this <template> <div :role="$options.name"> ... </div> </template> <script> export default { name: 'vmcomponentname' } </script> which takes name script , applies html. in browser get: <div role="vmcomponentname"> ... </div> line :role="$options.name" goes in every component. is there dry er solutions? please share. additional details i'll explain in details looking for. imagine have vmusercreate form creates user. test case can create user . to automatically test without role, have use following selector: .wrapper > .wrapper > .wrapper > .submit-button the test extremely brittle (will break lot). if use roles can use [role="vmusercreateform"] .submit-button selector. many folds less brittle. so basically, i'm ...
Read more

Add new key value to json node in java -

i have json file : { "id":1, "name":"abc", "addressdetails": { "city":"newyork" } } i wanted add 1 more key-value ("pincode" : "414141") node 'addressdetails'. i tried using : objectmapper mapper = new objectmapper(); jsonnode root = mapper.readtree(new file("d://test.json")); objectnode node = mapper.createobjectnode(); node.with("addressdetails").put("pincode", "414141"); but it's not getting added, there way can ? you can try you should modify file path objectmapper mapper = new objectmapper(); objectnode nodes = mapper.readvalue(new file("d:\\test.txt"), objectnode.class); nodes.with("addressdetails").put("pincode", "414141"); mapper.writer().writevalue(new file("d:\\test.txt"), nodes);
Read more