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? PHP ????? Laravel Laravel ??????? ?? ??? ? ??? : ?????? ?? ??

Laravel ??????? ?? ??? ? ??? : ?????? ?? ??

May 07, 2025 pm 05:05 PM

Laravel ??????? ??????? ?? ???? ??? ?? ? ??? ???????. 1) ??? ???? ? ??? ? ???? ???? ? ??????. 2) ??? ????? '???'???? ?? ???? ????. 3) '??'? ?? ??? ???? ?? ???? ??????. 4) Idempotency? ???? ??? ?? ?? ????? ?? ??????. 5) ?? ??? ??? ??? ????? ??? ???? ???? ??????.

??, ?? ??! ?????? ??? ?? ??? ??? ??? ?? ?? ? ?? ????? ??, ??? ?????? ??? ?????? ??? ? ?? ? Laravel Migrations? ??? ?? ?? ??? ??? ?? ?.

???? Laravel Migrations? ??? ???? ? ?? ?????? ??????? ?? ??? ??????. GIT? ????? ?????? ???? ? ????? ??????? ???? ??? ??? ?? ?????? ???? ???? ???? ? ????. ??? ?? ?????, ?? ???? ???? ????, ???? ???? ?? ??? ??? ? ?? ?????.

?? ??? ?? ?? ???. ??? ????? ???? ??? ?????? ???? ??????? ???????. Laravel ??????? ???? ?? ? ? ????.

 Illuminate \ Database \ Migrations \ Migration? ??????.
Illuminate \ database \ schema \ blueprint? ??????.
Illuminate \ support \ Facades \ schema? ??????.

??? CreateUserserstable? ??????? ?????
{
    ?? ?? UP ()
    {
        schema :: create ( 'user', function (blueprint $ table) {
            $ table-> id ();
            $ table-> String ( 'name');
            $ table-> string ( 'email')-> ?? ();
            $ table-> timestamp ( 'email_verified_at')-> nullable ();
            $ table-> string ( '????');
            $ table-> rememberToken ();
            $ table-> timestamps ();
        });
    }

    ?? ?? ?? ()
    {
        ??? :: dropifexists ( '???');
    }
}

? ??????? ????? ??? ?? ????? users ???? ????. up ???? ??????? ??? ? ???? ? ??? ???? ?? down ???? ?? ??? ?????. ? ????

?? ?????? ???? ??? ?? ??????. Laravel? ??? ?????? ???? ???? ?? ?? ? ? ????. ??? ??? ?? ?? ????. ?? ??????? ??????. ?? ?? ????? ?? ??? ??????? ?? ? ???? ?? ? ? ???? ?? ??? ??? ?????? ?? ?????. ????? ???? ??? ?? ? ? ????.

??? ?? ???? ??????? ????? ????! users ???? phone ??? ????? ?? ? ???. ??? ??????? ?? ? ????.

 Illuminate \ Database \ Migrations \ Migration? ??????.
Illuminate \ database \ schema \ blueprint? ??????.
Illuminate \ support \ Facades \ schema? ??????.

??? AddPhonetouserstable? ??????? ?????
{
    ?? ?? UP ()
    {
        schema :: table ( '???', function (blueprint $ table) {
            $ table-> string ( '?')-> nullable ()-> apject ( 'email');
        });
    }

    ?? ?? ?? ()
    {
        schema :: table ( '???', function (blueprint $ table) {
            $ table-> dropcolumn ( '??');
        });
    }
}

? ??????? users ???? phone ??? ???? down ???? ??? ?? ???? ??? ?????.

?? Gotchas? ?? ?? ? ??? ?? ?????. ???? ? ? ??? ??? ?? ?????. ??? ?? ??? ?? ??? ??? ?? ??????? ?? ? ? ????? ????????.

 Illuminate \ support \ Facades \ db? ??????.
Illuminate \ support \ Facades \ schema? ??????.

??? ? ??? ??????? ?????
{
    ?? ?? ?? ()
    {
        ??? :: disableforeignkeyConstraints ();
        // ???? ?? ??
        ??? :: enableforeignkeyConstraints ();
    }
}

? ?? ?? ??????? ?? ??? ???? ????. ??????? ? ??? ???? ?? ? ???????? ??? ?? ????. Laravel? ?? ??? ??? ?? ? ????.

 ?? ?? UP ()
{
    schema :: create ( 'some_table', function (blueprint $ table) {
        // ??? ??
    });

    DB :: ???? (function () {
        // ???????? ?? ??
    });
}

??? ???? ? ? ?? ?????. ?? ??? ??? ??? ?? ??????? ??? ? ? ????. ?? ?? DB::statement ???? ??? ??? ?? RAW SQL? ??? ? ????.

 ?? ?? UP ()
{
    DB :: Statement ( 'Alter Table Some_table ?? ? New_Column Varchar (255)');
}

?? ??? Laravel? ??? ??? ???? ??? ?? ? ????.

????? ? ?? ?? ????? ?? ??? ? ???. ??????? ??? ???? ??????? ????????? Laravel? ???? ??? ?????. ??? ?? ?????? ??? ???? ?? ? ? ????.

 Illuminate \ Database \ Seeder? ??????.
Illuminate \ support \ Facades \ db? ??????.

??? Someseeder? ??? ?????
{
    ?? ?? run ()
    {
        db :: ??? ( 'some_table')-> ?? ([[
            // ???? ?? ???
        ]);
    }
}

??? ? ??? ??????? ?????
{
    ?? ?? UP ()
    {
        // ???? ?????? ??
        $ this-> Call (someseeder :: class);
    }
}

? ???? ??? ??? ??? ??? ???? ????????.

????? Laravel Migrations? ?????? ???? ?????? ??? ?????. ???, ??? ? ?? ???? ???? Laravel ????? ?? ??????. ??????? Idempotent? ???? ?? ?? ?? ????? ?? ???? ?? ??? ??? ?? ???? ??????. ? ?? ????, ??? ? ?????? ???? ? ????!

? ??? Laravel ??????? ?? ??? ? ??? : ?????? ?? ??? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!

? ????? ??
? ?? ??? ????? ???? ??? ??????, ???? ?????? ????. ? ???? ?? ???? ?? ??? ?? ????. ???? ??? ???? ???? ??? ?? admin@php.cn?? ?????.

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