1. Vue2 is learning to encounter a problem in the execution process is to select a column in Table click to edit and then pop up the modal box, put the contents of the column into the modal box, but reported an error: [Vue warn]: Invalid prop: type check failed for prop "model". Expected Object, got String. Please take a look at
DBTable.vue

<template>
<!--...... -->
<!--...... -->
   <el-table-column label="Operation" 
                    width="120">
           <template scope="scope">
              <el-button @click="editItem(scope.$index, tableData)" type="text" size="large"></el-button>
           </template>
   </el-table-column>
<!--...... -->
<!--DBTable.vue  -->
    <db-modal :dialogFormVisible="dialogFormVisible" :form="form" v-on:canclemodal="dialogVisible">
    </db-modal>
</template>

<script>
export default {
        data(){
            return {
                tableData: [],
                apiUrl: "http://127.0.0.1:8081/api/persons",
                sex: "",
                email: "", 
                dialogFormVisible: false,
                form: "",
            }
        },
        components: {
            DbModal
        },
</script>

then click Edit

            editItem: function (index, rows) {
                this.dialogFormVisible = true;
                const itemId = rows[index].id;
                const idurl = "http://127.0.0.1:8081/api/persons/detail/" + itemId;
                this.$axios.get(idurl).then((response) => {
                    this.form = response.data.extend.person; //form
                    console.log(typeof this.form);
                }).catch(function (response) {
                    console.log(response)
                });
            },

attach DBModal.vue code

<template>
    <el-dialog title="Edit" v-model="dialogFormVisible" :close-on-click-modal="false" :show-close="false">
        <el-form :model="form">
            <el-form-item label="item_id" :label-width="formLabelWidth">
                <el-input :disabled="true" v-model="form.id" auto-complete="off"></el-input>
            </el-form-item>
            <el-form-item label="username" :label-width="formLabelWidth">
                <el-input :disabled="true" v-model="form.username" auto-complete="off"></el-input>
            </el-form-item>

            <el-form-item label="email" :label-width="formLabelWidth">
                <el-input :disabled="true" v-model="form.email" auto-complete="off"></el-input>
            </el-form-item>

            <el-form-item label="phone" :label-width="formLabelWidth">
                <el-input v-model="form.phone" auto-complete="off"></el-input>
            </el-form-item>
            <el-form-item label="sex" :label-width="formLabelWidth">
                <el-input :disabled="true" v-model="form.sex" auto-complete="off"></el-input>
            </el-form-item>
            <el-form-item label="zone" :label-width="formLabelWidth">
                <el-input v-model="form.zone" auto-complete="off"></el-input>
            </el-form-item>

        </el-form>
        <div slot="footer" class="dialog-footer">
            <el-button :plain="true" type="danger" v-on:click="canclemodal">Cancel</el-button>
            <el-button :plain="true" @click="updateForm(form)">Save</el-button>
        </div>
    </el-dialog>
</template>


<script>
    export default {
        data(){
            return {
                formLabelWidth: "120px",
            }
        },
        props:["dialogFormVisible", "form"],
        // props: {
        //     dialogFormVisible:"",
        //     form: {
        //         type:[String, Object]
        //     },
        // }, 
        props:{
            dialogFormVisible:"",
            form:{
                type:[Object,String]
            }
        },
        methods: {
            updateForm: function (formName) {
                let itemId = formName.id;
                let phone = formName.phone;
                let zone = formName.zone;
                this.$axios.put("http://127.0.0.1:8081/api/persons/detail/" + itemId, {
                    phone: phone,
                    zone: zone
                })
                    .then(function (response) {
                        console.log(response);
                        this.form = response.data;

                    })
                    .catch(function (error) {
                        console.log(error);
                    });
                location.reload();
            },
            canclemodal: function () {
                this.$emit("canclemodal");
            }
        }

    }

</script>

used some methods, but it is not very good to report the error. Ask the front-end god to take a look at it