Merge branch 'fix-bug-criteria-json' into 'develop'

fixed bug => DONE

See merge request !37

src/app/search/components/criteria/json.component.html

@@ -4,10 +4,10 @@
         <div class="row">
             <div class="col-5">
                 <input class="form-control" name="path" [formControl]="jsonForm.controls.path" placeholder="Path"
-                    required autocomplete="off">
+                    autocomplete="off">
             </div>
             <div class="col-2 px-0">
-                <select class="form-control" name="operator" [formControl]="jsonForm.controls.operator" required>
+                <select class="form-control" name="operator" [formControl]="jsonForm.controls.operator">
                     <option></option>
                     <option value="eq">=</option>
                     <option value="gt">></option>
@@ -18,12 +18,15 @@
             </div>
             <div class="col-5">
                 <input class="form-control" name="value" [formControl]="jsonForm.controls.value"
-                    placeholder="Value" required autocomplete="off">
+                    placeholder="Value" autocomplete="off">
             </div>
         </div>
     </div>
     <div class="col-2 text-center">
-        <button class="btn btn-outline-success" *ngIf="!jsonForm.disabled" [hidden]="jsonForm.invalid"
-            (click)="addCriterion()"><i class="fas fa-plus-circle"></i></button>
+        <button class="btn btn-outline-success" *ngIf="!jsonForm.disabled"
+            [hidden]="!jsonForm.value.path || !jsonForm.value.operator || !jsonForm.value.value"
+            (click)="addCriterion()">
+            <i class="fas fa-plus-circle"></i>
+        </button>
     </div>
 </div>
\ No newline at end of file