more models

src/django_stockfin_db/models.py

@@ -1,8 +1,28 @@
-from django.db.models import Model, CharField, ForeignKey, TextChoices, PROTECT
+from django.db.models import Model
+from django.db.models.fields import CharField, FloatField, BooleanField, DateField, DateTimeField
+from django.db.models.fields.related import ForeignKey
+from django.db.models.deletion import PROTECT, CASCADE
+from django.db.models.enums import TextChoices
+
 from django.utils.translation import gettext_lazy as _
 
 
-class FinancialPosition(Model):
+class AbstractBaseModel(Model):
+
+    date_created = DateTimeField(
+        auto_now_add=True,
+        verbose_name=_("Time of creation")
+    )
+    date_modified = DateTimeField(
+        auto_now=True,
+        verbose_name=_("Time of last modification")
+    )
+
+    class Meta:
+        abstract = True
+
+
+class FinancialPosition(AbstractBaseModel):
 
     class FinStmt(TextChoices):
         BS = 'BS', _("Balance Sheet")
@@ -27,3 +47,66 @@ class FinancialPosition(Model):
         blank=True,
         verbose_name=_("Parent position")
     )
+
+
+class ReportingPeriod(AbstractBaseModel):
+
+    date_end = DateField(
+        db_index=True,
+        verbose_name=_("Period end date")
+    )
+    date_start = DateField(
+        db_index=True,
+        verbose_name=_("Period start date")
+    )
+    verified = BooleanField(
+        default=False,
+        verbose_name=_("Exact dates verified")
+    )
+
+
+class Company(AbstractBaseModel):
+
+    symbol = CharField(
+        max_length=16,
+        unique=True,
+        verbose_name=_("Stock ticker symbol")
+    )
+
+    class Meta:
+        verbose_name_plural = _("Companies")
+
+
+class CompanyName(AbstractBaseModel):
+
+    company = ForeignKey(
+        to=Company,
+        on_delete=CASCADE
+    )
+    name = CharField(
+        db_index=True,
+        verbose_name=_("Name")
+    )
+    name_since = DateField(
+        db_index=True,
+        verbose_name=_("Has this name since")
+    )
+
+
+class Figure(AbstractBaseModel):
+
+    position = ForeignKey(
+        to=FinancialPosition,
+        on_delete=PROTECT
+    )
+    period = ForeignKey(
+        to=ReportingPeriod,
+        on_delete=PROTECT
+    )
+    company = ForeignKey(
+        to=Company,
+        on_delete=PROTECT
+    )
+    value = FloatField(
+        verbose_name=_("Figure on financial statement")
+    )