SPA项目开发之CRUD+表单验证

1. 表单验证
Form组件提供了表单验证的功能，只需要通过 rules 属性传入约定的验证规则，
并将Form-Item的prop属性设置为需校验的字段名即可

<el-form-item label="活动名称" prop="name">
<el-form :model="ruleForm" :rules="rules" ref="ruleForm"

注1：有多个表单，怎么在提交进行区分？
我们在rules这里写了对表单的验证规则，但是我们如何在methods里进行指定的表单进行认证，
所以我们一开始就在el-form里写了 ref="ruleForm"，我们在methods里就可以用

注2：清空表单验证信息
this.$refs[formName].resetFields();

2. CUD
2.1 新增

2.2 添加修改/删除按钮

2.3 在<template>上使用特殊的slot-scope 特性，可以接收传递给插槽的prop

Articles.vue

<template>
    <div>
        <!-- 搜索筛选 -->
        <el-form :inline="true" :model="formInline" class="user-search">
            <el-form-item label="搜索：">
                <el-input size="small" v-model="formInline.title" placeholder="请输入文章标题"></el-input>
            </el-form-item>
            <el-form-item>
                <el-button size="small" type="primary" icon="el-icon-search" @click="search">搜索</el-button>
                <el-button size="small" type="primary" icon="el-icon-plus" @click="add">添加</el-button>
            </el-form-item>
        </el-form>
        <!--列表-->
        <el-table size="small" :data="listData" border element-loading-text="拼命加载中" style=" 100%;">
            <el-table-column sortable prop="id" label="ID" min-width="1">
            </el-table-column>
            <el-table-column sortable prop="title" label="文章标题" min-width="2">
            </el-table-column>
            <el-table-column sortable prop="body" label="文章内容" min-width="4">
            </el-table-column>
            <el-table-column align="center" label="操作" min-width="3">
                <template slot-scope="scope">
                    <el-button size="mini" @click="edit(scope.$index, scope.row)">编辑</el-button>
                    <el-button size="mini" type="danger" @click="del(scope.$index, scope.row)">删除</el-button>
                </template>
            </el-table-column>
        </el-table>
        <!-- 分页条 -->
        <el-pagination style="margin-top: 20px;" @size-change="handleSizeChange" @current-change="handleCurrentChange"
         :current-page="formInline.page" :page-sizes="[10, 20, 30, 50]" :page-size="formInline.rows" layout="total, sizes, prev, pager, next, jumper"
         :total="total">
        </el-pagination>

        <!-- 编辑界面 -->
        <el-dialog :title="title" :visible.sync="editFormVisible" width="30%" :before-close="closeDialog">
            <el-form label-width="120px" :model="editForm" :rules="rules" ref="editForm">
                <el-form-item label="文章标题" prop="title">
                    <el-input size="small" v-model="editForm.title" auto-complete="off" placeholder="请输入文章标题"></el-input>
                </el-form-item>
                <el-form-item label="文章内容" prop="body">
                    <el-input size="small" v-model="editForm.body" auto-complete="off" placeholder="请输入文章内容"></el-input>
                </el-form-item>
            </el-form>
            <div slot="footer" class="dialog-footer">
                <el-button size="small" @click="closeDialog">取消</el-button>
                <el-button size="small" type="primary" class="title" @click="submitForm('editForm')">保存</el-button>
            </div>
        </el-dialog>
    </div>
</template>

<script>
    export default {
        data() {
            return {
                listData: [],
                total: 0,
                formInline: {
                    title: '',
                    page: 1,
                    rows: 10,
                    total: 0
                },
                editFormVisible: false,
                title: '',
                editForm: {
                    title: '',
                    body: '',
                    id: 0
                },
                rules: {
                    title: [{
                        required: true,
                        message: '请输入文章标题',
                        trigger: 'blur'
                    }],
                    body: [{
                            required: true,
                            message: '请输入文章内容',
                            trigger: 'change'
                        },
                        {
                            min: 5,
                            message: '长度不能小于5个字符',
                            trigger: 'blur'
                        }
                    ]
                }
            };
        },
        methods: {
            search() {
                this.doSearch(this.formInline)
            },
            doSearch(params) {
                let url = this.axios.urls.SYSTEM_ARTICLE_LIST;
                this.axios.post(url, params).then((response) => {
                    this.listData = response.data.result;
                    this.total = response.data.pageBean.total;
                    console.log(response)
                }).catch((response) => {
                    console.log(response)
                });
            },
            handleSizeChange(rows) {
                this.formInline.page = 1;
                this.formInline.rows = rows;
                this.search();
            },
            handleCurrentChange(page) {
                this.formInline.page = page;
                this.search();
            },
            closeDialog() {
                this.editFormVisible = false
                this.clearForm();
            },
            submitForm(formName) {
                //用来提交新增、修改的表单数据，提交之前需要用过vue实例中定义的表单填写规则
                this.$refs[formName].validate((valid) => {
                    if (valid) {
                        let url;
                        if (this.editForm.id == 0) {
                            url = this.axios.urls.SYSTEM_ARTICLE_ADD;
                        } else {
                            url = this.axios.urls.SYSTEM_ARTICLE_EDIT;
                        }
                        this.axios.post(url, this.editForm).then((response) => {
                            this.clearForm();
                            this.doSearch(this.editForm);
                        }).catch((response) => {
                            console.log(response)
                        });
                    } else {
                        console.log('error submit!!');
                        return false;
                    }
                });
            },
            clearForm() {
                this.editForm.id = 0;
                this.editForm.title = '';
                this.editForm.body = '';
                this.formInline.page = 1;
                this.formInline.rows = 10;
                this.editFormVisible = false;
            },
            add() {
                this.title = "新增文章";
                this.editFormVisible = true;
            },
            edit(index, row) {
                // index代表的是操作数据在当前界面的行号
                // row代表的当前数据，那也叫意味着可以从row中获取所有数据库中的列段名
                this.title = "编辑文章";
                this.editForm.id = row.id;
                this.editForm.title = row.title;
                this.editForm.body = row.body;
                this.editFormVisible = true;
            },
            del(index, row) {
                if (confirm("你确定要删除吗")) {
                    let url = this.axios.urls.SYSTEM_ARTICLE_DEL;
                    this.axios.post(url, {
                        id: row.id
                    }).then((response) => {
                        this.clearForm();
                        this.doSearch(this.editForm);
                        if (response.data.code == 1) {
                            this.$message({
                                showClose: true,
                                message: response.data.msg,
                                type: 'success'
                            });
                        } else {
                            this.$message({
                                showClose: true,
                                message: response.data.msg,
                                type: 'error'
                            });
                        }
                    }).catch((response) => {
                        console.log(response)
                    });
                }
            }
        },
        created() {
            this.doSearch({})
        }
    }
</script>
<style>
</style>