prevent error in feature_detail special field

src/views/feature/Feature_detail.vue

@@ -51,31 +51,37 @@
     <div class="row">
       <div class="seven wide column">
         <table class="ui very basic table">
-          <tbody>test
-            <tr v-for="field in feature.feature_data" :key="field.label">
-              <td>
-                <b>{{ field.label }}</b>
-              </td>
-              <td>
-                <b>
-                  <i
-                    v-if="
-                      field.field_type === 'boolean' && field.value === true
-                    "
-                    class="olive check icon"
-                  ></i>
-                  <i
-                    v-else-if="
-                      field.field_type === 'boolean' && field.value === false
-                    "
-                    class="red times icon"
-                  ></i>
-                  <span v-else>
-                    {{ field.value }}
-                  </span>
-                </b>
-              </td>
-            </tr>
+          <tbody>
+            <div
+              v-frag
+              v-for="(field, index) in feature.feature_data"
+              :key="'field' + index"
+            >
+              <tr v-if="field">
+                <td>
+                  <b>{{ field.label }}</b>
+                </td>
+                <td>
+                  <b>
+                    <i
+                      v-if="
+                        field.field_type === 'boolean' && field.value === true
+                      "
+                      class="olive check icon"
+                    ></i>
+                    <i
+                      v-else-if="
+                        field.field_type === 'boolean' && field.value === false
+                      "
+                      class="red times icon"
+                    ></i>
+                    <span v-else>
+                      {{ field.value }}
+                    </span>
+                  </b>
+                </td>
+              </tr>
+            </div>
             <tr>
               <td>Auteur</td>
               <td>{{ feature.display_creator }}</td>
@@ -300,7 +306,7 @@
                       : "Sélectionner un fichier ..."
                   }}</span>
                 </label>
-               <!--  // todo : get image from "C:\\fakepath\..." -->
+                <!--  // todo : get image from "C:\\fakepath\..." -->
                 <input
                   type="file"
                   accept="application/pdf, image/jpeg, image/png"