fix

@@ -10,7 +10,7 @@
 
         <Form ref="formData" :model="formData" :label-width="70" :rules="ruleValidate">
             <Form-item label="品牌" prop="brandId">
-                <select-brand v-model="formData.brandId" @change="selectBrand" style="width: 300px;"></select-brand>
+                <select-brand v-model="formData.brandId" @change="selectBrand" :selectWhenOnlyOne="true" style="width: 300px;"></select-brand>
             </Form-item>
 
             <Form-item label="销售类型" prop="sellType">