The value bound to v-model in el-select and how to echo it

The value bound to v-model in el-select and how to echo it

1. When v-model is bound to a certain value, there is nothing wrong with it, and the corresponding value can be echoed

2. When other attributes in options need to be used, when v-model binding a single value cannot solve the demand, it needs to be bound into an object

<el-select v-model="selected" value-key="id" >
             <el-option value="" label="请选择" />
             <el-option
                v-for="item in options"
                :key="item.id"     
                :label="item.name"
                :value="item"
             />
    </el-select>

　　The value corresponding to :value is the value bound to the v-model. The item is an object at this time , so it will be very convenient to fetch and select other data in this object.

　　Echo: When echoing , the value bound to v-model must also be an object, that is, selected must be an object , and this object must contain the attribute bound in value-key (same name)

　　　　　The attribute name bound in the value-ley corresponds to the attribute name in the key, and the {value-key bound attribute value = the value of the object bound in the key} in the echo object will be echoed back to the success    value -The name in the key must be consistent with the key value

selected:{ id: response.result.id }
//There must be an id attribute in the object, and the presence of other attributes will not affect the echo
//This can be echoed