link create button changes

application/Espo/Resources/metadata/fields/linkOne.json

@@ -16,6 +16,10 @@
         {
             "name": "readOnlyAfterCreate",
             "type": "bool"
+        },
+        {
+            "name": "createButton",
+            "type": "bool"
         }
     ],
     "actualFields": [

client/res/templates/fields/link/edit.tpl

@@ -12,7 +12,7 @@
         {{#if createButton}}
         <button
             data-action="createLink"
-            class="btn btn-default btn-icon"
+            class="btn btn-default btn-icon{{#if idValue}} hidden{{/if}}"
             type="button"
             title="{{translate 'Create'}}"
         ><i class="fas fa-plus"></i></button>

client/src/views/fields/link.js

@@ -376,6 +376,8 @@ class LinkFieldView extends BaseFieldView {
 
         this.trigger('change');
 
+        this.controlCreateButtonVisibility();
+
         this.getSelectFieldHandler().then(handler => {
             handler.getAttributes(model)
                 .then(attributes => {
@@ -393,14 +395,29 @@ class LinkFieldView extends BaseFieldView {
 
         this.trigger('change');
 
+        this.controlCreateButtonVisibility();
+
         this.getSelectFieldHandler().then(handler => {
             handler.getClearAttributes()
                 .then(attributes => {
-                    this.model.set(attributes)
+                    this.model.set(attributes);
                 });
         });
     }
 
+    /** @private */
+    controlCreateButtonVisibility() {
+        if (!this.createButton) {
+            return;
+        }
+
+        const $btn = this.$el.find('[data-action="createLink"]');
+
+        this.model.get(this.idName) ?
+            $btn.addClass('hidden') :
+            $btn.removeClass('hidden');
+    }
+
     /**
      * @private
      * @return {Promise<{