Added the data models of the accounting application.

accounting/models.py

@@ -1,3 +1,111 @@
+# The accounting application of the Mia project.
+#   by imacat <imacat@mail.imacat.idv.tw>, 2020/6/29
+
+#  Copyright (c) 2020 imacat.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+
+"""The data models of the accounting application.
+
+"""
+
 from django.db import models
 
-# Create your models here.
+
+class Subject(models.Model):
+    """An accounting subject."""
+    sn = models.IntegerField(primary_key=True)
+    parent = models.ForeignKey(
+        "self", on_delete=models.PROTECT, null=True, blank=True,
+        db_column="parent_sn")
+    code = models.CharField(max_length=5)
+    title_zhtw = models.CharField(max_length=32)
+    title_en = models.CharField(max_length=128, null=True, blank=True)
+    title_zhcn = models.CharField(
+        max_length=32, null=True, blank=True)
+    created_at = models.DateTimeField(
+        auto_now_add=True, db_column="created")
+    created_by_sn = models.IntegerField(
+        default=923153018, db_column="createdby")
+    updated_at = models.DateTimeField(
+        auto_now_add=True, db_column="updated")
+    updated_by_sn = models.IntegerField(
+        default=923153018, db_column="updatedby")
+
+    def __str__(self):
+        """Returns the string representation of this accounting
+        subject."""
+        return self.code.__str__() + " " + self.title_zhtw.__str__()
+
+    class Meta:
+        db_table = "accounting_subjects"
+        ordering = ["code"]
+
+
+class Transaction(models.Model):
+    """An accounting transaction."""
+    sn = models.IntegerField(primary_key=True)
+    date = models.DateField(auto_now_add=True)
+    ord = models.PositiveSmallIntegerField(default=1)
+    note = models.CharField(max_length=128, null=True, blank=True)
+    created_at = models.DateTimeField(
+        auto_now_add=True, db_column="created")
+    created_by_sn = models.IntegerField(
+        default=923153018, db_column="createdby")
+    updated_at = models.DateTimeField(
+        auto_now_add=True, db_column="updated")
+    updated_by_sn = models.IntegerField(
+        default=923153018, db_column="updatedby")
+
+    def __str__(self):
+        """Returns the string representation of this accounting
+        transaction."""
+        return self.date.__str__() + " #" + self.ord.__str__()
+
+    class Meta:
+        db_table = "accounting_transactions"
+        ordering = ["date", "ord"]
+
+
+class Record(models.Model):
+    """An accounting record."""
+    sn = models.IntegerField(primary_key=True)
+    transaction = models.ForeignKey(
+        Transaction, on_delete=models.CASCADE,
+        db_column="transaction_sn")
+    is_credit = models.BooleanField()
+    ord = models.PositiveSmallIntegerField(default=1)
+    subject = models.ForeignKey(
+        Subject, on_delete=models.PROTECT, db_column="subject_sn")
+    summary = models.CharField(max_length=128, blank=True, null=True)
+    amount = models.PositiveIntegerField()
+    created_at = models.DateTimeField(
+        auto_now_add=True, db_column="created")
+    created_by_sn = models.IntegerField(
+        default=923153018, db_column="createdby")
+    updated_at = models.DateTimeField(
+        auto_now_add=True, db_column="updated")
+    updated_by_sn = models.IntegerField(
+        default=923153018, db_column="updatedby")
+
+    def __str__(self):
+        """Returns the string representation of this accounting
+        record."""
+        return self.transaction.date.__str__() + " "\
+               + self.subject.title_zhtw.__str__()\
+               + " " + self.summary.__str__()\
+               + " " + self.amount.__str__()
+
+    class Meta:
+        db_table = "accounting_records"
+        ordering = ["is_credit", "ord"]