如何使用 ANTd 在 React 中创建动态表单输入字段

Question

代码沙盒链接： https://codesandbox.io/s/compassionate-sanderson-1m8nv?file=/src/App.js

我无法找到有关此主题的太多信息。以下是我想要实现的目标：

我希望用户能够编辑数据库中已存在的采购订单的一些详细信息，然后使用表单重新提交采购订单。原始采购订单的详细信息应显示在表单输入字段中，用户可以直接通过这些字段更改它们然后提交。

我不精通网络开发，所以请多多包涵。

我希望最终的表单对象如下所示：

{
    po_number:"123abc",
    carrier:"Fastway",
    items: [{
                item_code:"dnh75n",
                quantity:"10",
                special_requirements:"Add picture of happy dog"
            },
            {
                item_code:"456def",
                quantity:"4",
                special_requirements:"Do not include lids"
            }
        ]
}

生成的表单输入字段的数量将取决于采购订单中有多少商品。我在下面创建了一个简单的 React 组件来演示我想要做什么。或者只是签出上面的代码沙箱链接。任何帮助，将不胜感激。我什至找不到有关如何对 ANTd 表单项目进行分组以在采购订单中创建项目数组的信息。我在他们的网站上看到了很多动态表单示例，但我想根据采购订单中预先存在的项目创建表单，而不是添加带有用户输入的字段。

import { Form, Input, Button } from 'antd';

//This is the order that already exists
const order = {
    po_number:"123abc",
    carrier:"Fastway",
    items: [{
                item_code:"dnh75n",
                quantity:"10",
                special_requirements:"Add picture of happy dog"
            },
            {
                item_code:"456def",
                quantity:"4",
                special_requirements:"Do not include lids"
            }
        ]
};


const GroupForm = () => {

    const onFinish = values => {
        console.log(values);
    }
    

    //Create form fields based off how many items are in the order
    const itemInputs = order.items.map(item => {
        return (
            <div>
                <b>Item{" " + item.item_code}</b>
                <Form.Item name={item.item_code + "_quantity"} label="quantity">
                    <Input defaultValue={item.quantity} style={{width: "500px"}} />
                </Form.Item>

                <Form.Item name={item.item_code + "_requirements"} label="speacial requirements">
                    <Input defaultValue={item.special_requirements}  style={{width: "500px"}} />
                </Form.Item>
            </div>
        );
    });

    return(
        <div>
            <Form onFinish={onFinish}>
                <b>{"Order " + order.po_number}</b>
                
                <Form.Item name="carrier" label="carrier">
                    <Input defaultValue={order.carrier} style={{width: "500px"}} />
                </Form.Item>

                <b>Order Items</b>

                {itemInputs}

                <Form.Item>
                    <Button type="primary" htmlType="submit"> Change Details </Button>
                </Form.Item>
            </Form>
        </div>
    );
}

export default GroupForm;

Answer 1

如果您使用的是 antd 版本 4.9.0+，则可以利用 Form.List 上的 initialValue 属性。这允许您在数组的表单项上设置初始值。或者，您可以在Form 上设置initialValues 属性。这是使用前一种方法的最小可行示例。

import { Form, Input, Button, Space } from "antd";
import { MinusCircleOutlined, PlusOutlined } from "@ant-design/icons";
import React from "react";

//Basic Idea
/* 
    I want the user to be able to edit some details of a purchase order that already exists in the database,
    then resubmit the order with a form.
    The details of the purchase order should be orginally displayed in the form input fields,
    and the user can change them directly via those fields. 
*/

//This is the order that already exists
const order = {
  po_number: "123abc",
  carrier: "Fastway",
  items: [
    {
      item_code: "dnh75n",
      quantity: "10",
      special_requirements: "Add picture of happy dog"
    },
    {
      item_code: "456def",
      quantity: "4",
      special_requirements: "Do not include lids"
    }
  ]
};

const GroupForm = () => {
  const onFinish = (values) => {
    console.log(values);
  };

  //Create form fields based off how many items are in the order
  const itemInputs = order.items.map((item) => {
    return {
      item_code: item.item_code,
      quantity: item.quantity,
      special_requirements: item.special_requirements
    };
  });

  return (
    <div>
      <Form onFinish={onFinish}>
        <b>{"Order " + order.po_number}</b>

        <Form.Item name="carrier" label="carrier" initialValue={order.carrier}>
          <Input style={{ width: "500px" }} />
        </Form.Item>
        <Form.Item
          name="po_number"
          label="PO number"
          initialValue={order.po_number}
          hidden
        >
          <Input />
        </Form.Item>

        <b>Order Items</b>

        <Form.List name="items" initialValue={itemInputs}>
          {(fields, { add, remove }) => (
            <>
              {fields.map((field) => (
                <Space
                  key={field.key}
                  style={{ display: "flex", marginBottom: 8 }}
                  align="baseline"
                >
                  <Form.Item
                    {...field}
                    name={[field.name, "item_code"]}
                    fieldKey={[field.fieldKey, "item_code"]}
                  >
                    <Input placeholder="Item Code" />
                  </Form.Item>
                  <Form.Item
                    {...field}
                    name={[field.name, "quantity"]}
                    fieldKey={[field.fieldKey, "quantity"]}
                  >
                    <Input placeholder="Quantity" />
                  </Form.Item>
                  <Form.Item
                    {...field}
                    name={[field.name, "special_requirements"]}
                    fieldKey={[field.fieldKey, "special_requirements"]}
                  >
                    <Input placeholder="Quantity" />
                  </Form.Item>
                  <MinusCircleOutlined onClick={() => remove(field.name)} />
                </Space>
              ))}
              <Form.Item>
                <Button
                  type="dashed"
                  onClick={() => add()}
                  block
                  icon={<PlusOutlined />}
                >
                  Add item
                </Button>
              </Form.Item>
            </>
          )}
        </Form.List>

        <Form.Item>
          <Button type="primary" htmlType="submit">
            {" "}
            Change Details{" "}
          </Button>
        </Form.Item>
      </Form>
    </div>
  );
};

export default GroupForm;

// I want to submit a form object that looks like this. E.g.
// This is what 'onFinish' should display in the console
/*

{
    po_number:"123abc",
    carrier:"Fastway",
    items: [{
                item_code:"dnh75n",
                quantity:"10",
                special_requirements:"Add picture of happy dog"
            },
            {
                item_code:"456def",
                quantity:"4",
                special_requirements:"Do not include lids"
            }
        ]
}

*/

DEMO