Form Basics and CSRF Protection

Yeah, validation will come with module 7, which focuses on form flow. The database modules are the last large modules, so things should start flowing quickly thereafter :)

Anything that doesn't report an error is considered valid. So, to walk through the example within Vine's documentation:

import { FieldContext } from '@vinejs/vine/types'

/**
 * Options accepted by the unique rule
 */
type Options = {
  table: string
  column: string
}

/**
 * Implementation
 */
async function unique(
  value: unknown,
  options: Options,
  field: FieldContext
) {
  /**
   * 1. If the value isn't a valid string, we'll bail out here
   * The "string" rule will handle this particular validation
   * vine.string().use(unique({...}))
   */
  if (typeof value !== 'string') {
    return
  }
  
  // 2. Otherwise, we'll continue validating uniqueness by checking the db
  const row = await db
   .select(options.column)
   .from(options.table)
   .where(options.column, value)
   .first()
   
  // 3. If value is NOT unique, we'll report the error
  if (row) {
    field.report(
      'The {{ field }} field is not unique',
      'unique',
      field
    )
  }

  // If no error was reported by the end of the method
  // we'll assume everything was valid
}

export const uniqueRule = vine.createRule(unique)

  

    

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