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app/models/catalog.py

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+from app.extensions import db
+from app.models.base import TimestampMixin
+
+
+class Customer(TimestampMixin, db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    company_id = db.Column(db.Integer, db.ForeignKey('company.id'), nullable=False, index=True)
+    name = db.Column(db.String(255), nullable=False)
+    tax_id = db.Column(db.String(32), index=True, default='')
+    email = db.Column(db.String(255), default='')
+    address = db.Column(db.String(255), default='')
+    regon = db.Column(db.String(32), default='')
+    is_active = db.Column(db.Boolean, default=True, nullable=False)
+
+    company = db.relationship('Company', backref=db.backref('customers', lazy='dynamic', cascade='all, delete-orphan'))
+
+    __table_args__ = (db.UniqueConstraint('company_id', 'name', name='uq_customer_company_name'),)
+
+
+class Product(TimestampMixin, db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    company_id = db.Column(db.Integer, db.ForeignKey('company.id'), nullable=False, index=True)
+    name = db.Column(db.String(255), nullable=False)
+    sku = db.Column(db.String(64), default='')
+    unit = db.Column(db.String(16), default='szt.')
+    net_price = db.Column(db.Numeric(12, 2), nullable=False, default=0)
+    vat_rate = db.Column(db.Numeric(5, 2), nullable=False, default=23)
+    split_payment_default = db.Column(db.Boolean, default=False, nullable=False)
+    is_active = db.Column(db.Boolean, default=True, nullable=False)
+
+    company = db.relationship('Company', backref=db.backref('products', lazy='dynamic', cascade='all, delete-orphan'))
+
+    __table_args__ = (db.UniqueConstraint('company_id', 'name', name='uq_product_company_name'),)
+
+
+class InvoiceLine(TimestampMixin, db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    invoice_id = db.Column(db.Integer, db.ForeignKey('invoice.id'), nullable=False, index=True)
+    product_id = db.Column(db.Integer, db.ForeignKey('product.id'), index=True)
+    description = db.Column(db.String(255), nullable=False)
+    quantity = db.Column(db.Numeric(12, 2), nullable=False, default=1)
+    unit = db.Column(db.String(16), default='szt.')
+    unit_net = db.Column(db.Numeric(12, 2), nullable=False, default=0)
+    vat_rate = db.Column(db.Numeric(5, 2), nullable=False, default=23)
+    net_amount = db.Column(db.Numeric(12, 2), nullable=False, default=0)
+    vat_amount = db.Column(db.Numeric(12, 2), nullable=False, default=0)
+    gross_amount = db.Column(db.Numeric(12, 2), nullable=False, default=0)
+
+    invoice = db.relationship('Invoice', backref=db.backref('lines', lazy='dynamic', cascade='all, delete-orphan'))
+    product = db.relationship('Product')