Show only JSON encoding strategy for multi value fields

client/web/compose/src/components/Admin/Module/DalFieldStoreEncoding.vue

@@ -92,6 +92,11 @@ export default {
       required: true,
     },
 
+    isMulti: {
+      type: Boolean,
+      default: false,
+    },
+
     // default store-ident
     storeIdent: {
       type: String,
@@ -121,17 +126,18 @@ export default {
 
       // strategy before omit
       undoOmit: this.defaultStrategy,
-
-      // list of available strategies
-      strategies: [
-        { value: types.Plain, text: this.$t('strategies.plain.label') },
-        { value: types.Alias, text: this.$t('strategies.alias.label') },
-        { value: types.JSON, text: this.$t('strategies.json.label') },
-      ],
     }
   },
 
   computed: {
+    strategies () {
+      return [
+        { value: types.Plain, text: this.$t('strategies.plain.label'), disabled: this.isMulti },
+        { value: types.Alias, text: this.$t('strategies.alias.label'), disabled: this.isMulti },
+        { value: types.JSON, text: this.$t('strategies.json.label') },
+      ].filter(({ disabled }) => !disabled)
+    },
+
     showIdentInput () {
       return [types.JSON, types.Alias, types.Plain].includes(this.strategy)
     },

client/web/compose/src/components/Admin/Module/DalSettings.vue

@@ -35,11 +35,12 @@
       :description="$t('module-fields.description')"
     >
       <dal-field-store-encoding
-        v-for="({ field, storeIdent, label }) in moduleFields"
+        v-for="({ field, storeIdent, label, isMulti }) in moduleFields"
         :key="field"
         :config="moduleFieldEncoding[field] || {}"
         :field="field"
         :label="label"
+        :is-multi="isMulti"
         :default-strategy="moduleFieldDefaultEncodingStrategy"
         :store-ident="storeIdent"
         @change="applyModuleFieldStrategyConfig(field, $event)"
@@ -162,6 +163,7 @@ export default {
             field: f.name,
             label: f.label || f.name,
             storeIdent: f.name,
+            isMulti: f.isMulti,
           }
 
           // In case of a JSON encoding strategy, default to values