How does the parent component of Mini Program invoke the form method in the child component?

formSubmit
formSubmit e {
    this.triggerEvent("formSubmit")
}
<son-form bindsubmit="formSubmit"></son-form>
formSubmit
formSubmit e {
    console.log(1)
}



this.selectComponent (selector). Func ()

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e46dfe-6658d.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e46dfe-6658d.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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