extra 设置表单扩展提示信息，用于字段说明

[suibansheng]

extra 说明是 根据 record 动态生成说明，有没有操作方式

[dosubot]

To dynamically generate the extra property for form extension hints based on record data, you can use a computed property in Vue. Here's a concise guide:

1. Access Record Data: Make sure the record data is accessible in your component, either directly or through injection.

2. Create a Computed Property: Define a computed property that generates the hint based on the record data. This ensures the hint updates automatically with data changes.

3. Bind the Computed Property: Use this computed property as the value for the extra property in your form item component.

Example implementation:

<script setup>
import { computed, inject } from 'vue'

const formModel = inject('formModel') // Accessing the record data

const dynamicHint = computed(() => {
  const fieldValue = formModel.value.someField // Customize to access the correct field
  return `Current value is: ${fieldValue}` // Customize the hint message
})
</script>

In your template, bind dynamicHint to the extra property of the form item:

<ma-form-item :extra="dynamicHint.value">

Ensure your ma-form-item component can accept and properly handle the extra prop, passing it down to the underlying form item component it wraps. If ma-form-item is a custom component, you might need to modify it to support this functionality.

Sources

• src/components/ma-form/formItem/form-input.vue
• src/components/ma-form/formItem/form-item.vue

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