387 lines
13 KiB
Python
387 lines
13 KiB
Python
# The accounting application of the Mia project.
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# by imacat <imacat@mail.imacat.idv.tw>, 2020/6/29
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# Copyright (c) 2020 imacat.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""The data models of the accounting application.
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"""
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from dirtyfields import DirtyFieldsMixin
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from django.conf import settings
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from django.db import models
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from django.db.models import Sum, Case, When, F, Q
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from django.urls import reverse
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from mia_core.utils import get_multi_lingual_attr, set_multi_lingual_attr
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class Account(DirtyFieldsMixin, models.Model):
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"""An account."""
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id = models.PositiveIntegerField(primary_key=True)
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parent = models.ForeignKey(
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"self", on_delete=models.PROTECT, null=True, blank=True,
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related_name="child_set")
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code = models.CharField(max_length=5, unique=True)
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title_zh_hant = models.CharField(
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max_length=32, db_column="title_zhtw")
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title_en = models.CharField(max_length=128, null=True, blank=True)
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title_zh_hans = models.CharField(
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max_length=32, null=True, blank=True, db_column="title_zhcn")
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created_at = models.DateTimeField(
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auto_now_add=True, db_column="created")
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created_by = models.ForeignKey(
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settings.AUTH_USER_MODEL, on_delete=models.PROTECT,
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db_column="createdby",
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related_name="created_accounting_accounts")
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updated_at = models.DateTimeField(
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auto_now_add=True, db_column="updated")
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updated_by = models.ForeignKey(
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settings.AUTH_USER_MODEL, on_delete=models.PROTECT,
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db_column="updatedby",
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related_name="updated_accounting_accounts")
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CASH = "1111"
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ACCUMULATED_BALANCE = "3351"
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NET_CHANGE = "3353"
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def __init__(self, *args, **kwargs):
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super(Account, self).__init__(*args, **kwargs)
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self.url = None
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self.debit_amount = None
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self.credit_amount = None
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self.amount = None
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self.is_for_debit = None
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self.is_for_credit = None
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self.is_in_use = None
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def __str__(self):
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"""Returns the string representation of this account."""
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return self.code.__str__() + " " + self.title
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class Meta:
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db_table = "accounting_accounts"
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@property
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def title(self):
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return get_multi_lingual_attr(self, "title")
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@title.setter
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def title(self, value):
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set_multi_lingual_attr(self, "title", value)
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@property
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def option_data(self):
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return {
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"code": self.code,
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"title": self.title,
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}
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class Transaction(DirtyFieldsMixin, models.Model):
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"""An accounting transaction."""
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id = models.PositiveIntegerField(primary_key=True)
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date = models.DateField()
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ord = models.PositiveSmallIntegerField(default=1)
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notes = models.CharField(max_length=128, null=True, blank=True)
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created_at = models.DateTimeField(
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auto_now_add=True, db_column="created")
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created_by = models.ForeignKey(
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settings.AUTH_USER_MODEL, on_delete=models.PROTECT,
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db_column="createdby",
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related_name="created_accounting_transactions")
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updated_at = models.DateTimeField(
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auto_now_add=True, db_column="updated")
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updated_by = models.ForeignKey(
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settings.AUTH_USER_MODEL, on_delete=models.PROTECT,
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db_column="updatedby",
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related_name="updated_accounting_transactions")
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def __init__(self, *args, **kwargs):
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super(Transaction, self).__init__(*args, **kwargs)
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self._records = None
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self._is_balanced = None
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self._has_order_hole = None
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def __str__(self):
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"""Returns the string representation of this accounting
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transaction."""
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return self.date.__str__() + " #" + self.ord.__str__()
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def get_absolute_url(self):
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"""Returns the URL to view this transaction."""
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if self.is_cash_expense:
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return reverse(
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"accounting:transactions.show", args=("expense", self))
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elif self.is_cash_income:
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return reverse(
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"accounting:transactions.show", args=("income", self))
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else:
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return reverse(
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"accounting:transactions.show", args=("transfer", self))
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def is_dirty(self, **kwargs):
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"""Returns whether the data of this transaction is changed and need
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to be saved into the database.
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Returns:
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bool: True if the data of this transaction is changed and need
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to be saved into the database, or False otherwise.
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"""
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if super(Transaction, self).is_dirty(**kwargs):
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return True
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if len([x for x in self.records if x.is_dirty(**kwargs)]) > 0:
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return True
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kept = [x.pk for x in self.records]
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if len([x for x in self.record_set.all() if x.pk not in kept]) > 0:
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return True
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return False
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class Meta:
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db_table = "accounting_transactions"
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@property
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def records(self):
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"""The records of the transaction.
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Returns:
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list[Record]: The records.
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"""
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if self._records is None:
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self._records = list(self.record_set.all())
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self._records.sort(key=lambda x: (x.is_credit, x.ord))
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return self._records
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@records.setter
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def records(self, value):
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self._records = value
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@property
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def debit_records(self):
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"""The debit records of this transaction.
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Returns:
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list[Record]: The records.
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"""
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return [x for x in self.records if not x.is_credit]
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def debit_total(self):
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"""The total amount of the debit records."""
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return sum([x.amount for x in self.debit_records
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if isinstance(x.amount, int)])
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@property
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def debit_summaries(self):
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"""The summaries of the debit records.
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Returns:
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list[str]: The summaries of the debit records.
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"""
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return [x.account.title if x.summary is None else x.summary
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for x in self.debit_records]
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@property
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def credit_records(self):
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"""The credit records of this transaction.
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Returns:
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list[Record]: The records.
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"""
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return [x for x in self.records if x.is_credit]
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def credit_total(self):
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"""The total amount of the credit records."""
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return sum([x.amount for x in self.credit_records
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if isinstance(x.amount, int)])
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@property
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def credit_summaries(self):
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"""The summaries of the credit records.
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Returns:
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list[str]: The summaries of the credit records.
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"""
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return [x.account.title if x.summary is None else x.summary
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for x in self.credit_records]
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@property
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def amount(self):
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"""The amount of this transaction.
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Returns:
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int: The amount of this transaction.
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"""
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return self.debit_total()
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@property
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def is_balanced(self):
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"""Whether the sum of the amounts of the debit records is the
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same as the sum of the amounts of the credit records. """
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if self._is_balanced is None:
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debit_sum = sum([x.amount for x in self.debit_records])
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credit_sum = sum([x.amount for x in self.credit_records])
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self._is_balanced = debit_sum == credit_sum
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return self._is_balanced
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@is_balanced.setter
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def is_balanced(self, value):
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self._is_balanced = value
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def has_many_same_day(self):
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"""whether there are more than one transactions at this day,
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so that the user can sort their orders. """
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return Transaction.objects.filter(date=self.date).count() > 1
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@property
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def has_order_hole(self):
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"""Whether the order of the transactions on this day is not
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1, 2, 3, 4, 5..., and should be reordered. """
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if self._has_order_hole is None:
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orders = [x.ord for x in Transaction.objects.filter(
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date=self.date)]
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if len(orders) == 0:
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self._has_order_hole = False
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if max(orders) != len(orders):
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self._has_order_hole = True
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elif min(orders) != 1:
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self._has_order_hole = True
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elif len(orders) != len(set(orders)):
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self._has_order_hole = True
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else:
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self._has_order_hole = False
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return self._has_order_hole
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@has_order_hole.setter
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def has_order_hole(self, value):
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self._has_order_hole = value
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@property
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def is_cash_income(self):
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"""Whether this transaction is a cash income transaction."""
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debit_records = self.debit_records
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return (len(debit_records) == 1
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and debit_records[0].account.code == Account.CASH
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and debit_records[0].summary is None)
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@property
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def is_cash_expense(self):
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"""Whether this transaction is a cash expense transaction."""
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credit_records = self.credit_records
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return (len(credit_records) == 1
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and credit_records[0].account.code == Account.CASH
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and credit_records[0].summary is None)
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@property
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def type(self):
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"""The transaction type."""
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if self.is_cash_expense:
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return "expense"
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elif self.is_cash_income:
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return "income"
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else:
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return "transfer"
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class Record(DirtyFieldsMixin, models.Model):
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"""An accounting record."""
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id = models.PositiveIntegerField(primary_key=True)
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transaction = models.ForeignKey(
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Transaction, on_delete=models.CASCADE)
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is_credit = models.BooleanField()
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ord = models.PositiveSmallIntegerField()
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account = models.ForeignKey(
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Account, on_delete=models.PROTECT)
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summary = models.CharField(max_length=128, blank=True, null=True)
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amount = models.PositiveIntegerField()
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created_at = models.DateTimeField(
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auto_now_add=True, db_column="created")
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created_by = models.ForeignKey(
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settings.AUTH_USER_MODEL, on_delete=models.PROTECT,
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db_column="createdby",
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related_name="created_accounting_records")
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updated_at = models.DateTimeField(
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auto_now_add=True, db_column="updated")
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updated_by = models.ForeignKey(
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settings.AUTH_USER_MODEL, on_delete=models.PROTECT,
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db_column="updatedby",
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related_name="updated_accounting_records")
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def __init__(self, *args, **kwargs):
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super(Record, self).__init__(*args, **kwargs)
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self._debit_amount = None
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self._credit_amount = None
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self.balance = None
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self._is_balanced = None
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self._has_order_hole = None
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self._is_payable = None
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self._is_existing_equipment = None
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self.is_payable = False
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self.is_existing_equipment = False
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def __str__(self):
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"""Returns the string representation of this accounting
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record."""
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return "%s %s %s %s" % (
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self.transaction.date,
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self.account.title,
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self.summary,
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self.amount)
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class Meta:
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db_table = "accounting_records"
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@property
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def debit_amount(self):
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"""The debit amount of this accounting record."""
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if self._debit_amount is None:
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self._debit_amount = self.amount if not self.is_credit else None
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return self._debit_amount
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@debit_amount.setter
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def debit_amount(self, value):
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self._debit_amount = value
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@property
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def credit_amount(self):
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"""The credit amount of this accounting record."""
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if self._credit_amount is None:
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self._credit_amount = self.amount if self.is_credit else None
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return self._credit_amount
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@credit_amount.setter
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def credit_amount(self, value):
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self._credit_amount = value
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@property
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def is_balanced(self):
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"""Whether the transaction of this record is balanced. """
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if self._is_balanced is None:
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self._is_balanced = self.transaction.is_balanced
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return self._is_balanced
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@is_balanced.setter
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def is_balanced(self, value):
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self._is_balanced = value
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@property
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def has_order_hole(self):
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"""Whether the order of the transactions on this day is not
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1, 2, 3, 4, 5..., and should be reordered. """
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if self._has_order_hole is None:
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self._has_order_hole = self.transaction.has_order_hole
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return self._has_order_hole
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@has_order_hole.setter
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def has_order_hole(self, value):
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self._has_order_hole = value
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