??? ??????? ? ??? ??? ??? ??? ????? ???? ?????. ??, ??? ??? ?? ??? ???? ??? ???? ??? ?? ??? ???? ?? ??? ?? ????. ??? SQLAlchemy?? ??? ??? ?? ??? ???? ????!

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

from config import db

class Sandwich(db.Model):
    __tablename__ = 'sandwiches'

    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String)
    description = db.Column(db.String)
    price = db.Column(db.Float)

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

sqlalchemy.orm?? ???? ??? ??

?? ?? ?? ??? '@validates' ?????? ???? ??? ?????.

    @validates('name')
    def validate_name(self, key, value):
        if not value:
            raise ValueError('Name cannot be empty.')
        if type(value) != str:
            raise ValueError('Name must be a string.')
        return value

?? ??? ?? ?? ???? ?? ???? ??? ??? ???. @validates? ??????? ???? ?? ??? ?? ??? ?? 'name' ?? ??? ?? ????? ORM? ??? ????????. ??? ???? ?? ????? ??????? ?????. "key" ??? ???? ????. ? ?? 'name'? ?? ?? ?? ???? ????? ?? ??(???? ??)???. ??? ???? ??? name ??? ?? ?? ???, ???? ????? ???? ????. ??? ??? ??? ?????.

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

    @validates('name', 'description')
    def validate_text(self, key, value):
        if not value:
            raise ValueError(f'{key} cannot be empty.')
        if type(value) != str:
            raise ValueError(f'{key} must be a string.')
        return value

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

    @validates('name')
    def validate_name(self, key, value):
        if not value:
            raise ValueError('Name cannot be empty.')
        if type(value) != str:
            raise ValueError('Name must be a string.')
        return value

    @validates('description')
        def validate_description(self, key, value):
        if not value:
            raise ValueError('Description cannot be empty.')
        if type(value) != str:
            raise ValueError('Description must be a string.')
        if not 10 



<p>?? ? ??? ?? ??? ??? ???? ???? ??? ? ??? ???? ? ??? ?? ???? ??? ??? ??? ? ????.<br>
</p>

<pre class="brush:php;toolbar:false">    @validates('name', 'description', 'price')
    def validate(self, key, value):
        if key != 'price:
            if not value:
                raise ValueError(f'{key} cannot be empty.')
            if type(value) != str:
                raise ValueError(f'{key} must be string.')
            if key == 'description':
                if not 10 



<p>?, ? ??????. 2?? ?? ??? ???? ????? ?????.<br>
</p>

<pre class="brush:php;toolbar:false">    @validates('name', 'description')
    def validate_text(self, key, value):
       if not value:
            raise ValueError(f'{key} cannot be empty.')
        if type(value) != str:
            raise ValueError(f'{key} must be string.')
        if key == 'description':
            if not 10 



<p>?? ? ???! ??? ??? ??? ????.<br>
</p>

<pre class="brush:php;toolbar:false">from sqlalchemy.orm import validates
from config import db

class Sandwich(db.Model):
    __tablename__ = 'sandwiches'

    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String)
    description = db.Column(db.String)
    price = db.Column(db.Float)

    @validates('name', 'description')
    def validate_text(self, key, value):
        if not value:
            raise ValueError(f'{key} cannot be empty.')
        if type(value) != str:
            raise ValueError(f'{key} must be string.')
        if key == 'description':
            if not 10 



<p>?????! ??? ??? ??????? ??? ??? ????? ???? ?? ?? ? ?????.</p>


          

            
        

? ??? ???? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!