accounts into dimension

2024-08-09 15:14:04 +01:00
parent 165464820b
commit da5cf943d6
7 changed files with 75 additions and 73 deletions
@@ -1,60 +1,41 @@
-# This file is used to define the dimension table for the accounts table
-# The accounts table contains information about the accounts in the budget
-# The accounts table has the following columns:
-# - id: the unique identifier for the account
-# - name: the name of the account
-# - type: the type of the account (e.g. checking, savings, credit card)
-# - on_budget: a boolean indicating whether the account is on budget
-# - closed: a boolean indicating whether the account is closed
-# - note: a note associated with the account
-# - balance: the current balance of the account
-# - cleared_balance: the cleared balance of the account
-# - uncleared_balance: the uncleared balance of the account
-# - deleted: a boolean indicating whether the account has been deleted
+import polars as pl
+class DimAccounts:
+    def __init__(self, config):
+        self.config = config
+        self.transform()

+    def transform(self):
+        file_path = self.config['base_data_path'] + '/accounts.parquet'
+        # Read the parquet file into a polars DataFrame
+        accounts_df = pl.read_parquet(file_path)

-# the below is mega tbc
+        # Transform the DataFrame
+        accounts_df = (
+            accounts_df
+            .with_columns([
+                pl.col("id").alias("account_id"),
+                pl.col("name").alias("account_name"),
+                pl.col("type").alias("account_type"),
+                pl.col("on_budget").alias("on_budget"),
+                pl.col("closed").alias("closed"),
+                pl.col("note").alias("note"),
+                pl.col("balance").alias("balance"),
+                pl.col("cleared_balance").alias("cleared_balance"),
+                pl.col("uncleared_balance").alias("uncleared_balance"),
+                pl.col("deleted").alias("deleted"),
+            ])
+            .with_columns([
+                pl.col("note").fill_null("unknown"),
+                (pl.col("balance") / 100).alias("balance"),
+                (pl.col("cleared_balance") / 100).alias("cleared_balance"),
+                (pl.col("uncleared_balance") / 100).alias("uncleared_balance"),
+            ])
+            .drop([
+                "transfer_payee_id", "direct_import_linked", "direct_import_in_error",
+                "last_reconciled_at", "debt_original_balance", "debt_interest_rates",
+                "debt_minimum_payments", "debt_escrow_amounts", "ingestion_date"
+            ])
+        )
+        # Write the DataFrame to a new parquet file
+        accounts_df.write_parquet(self.config['warehouse_data_path'] + '/accounts.parquet')

-import pandas as pd
-from datetime import datetime
-
-def handle_scd_type_2(dim_accounts_df, new_data_df):
-    current_date = datetime.now().date()
-    
-    for index, new_row in new_data_df.iterrows():
-        account_id = new_row['account_id']
-        existing_rows = dim_accounts_df[dim_accounts_df['account_id'] == account_id]
-        
-        if existing_rows.empty:
-            # Insert new record
-            new_row['start_date'] = current_date
-            new_row['end_date'] = None
-            new_row['is_current'] = True
-            dim_accounts_df = dim_accounts_df.append(new_row, ignore_index=True)
-        else:
-            current_row = existing_rows[existing_rows['is_current'] == True].iloc[0]
-            if not new_row.equals(current_row.drop(['surrogate_key', 'start_date', 'end_date', 'is_current'])):
-                # Update existing record to set is_current to False and end_date
-                dim_accounts_df.loc[current_row.name, 'is_current'] = False
-                dim_accounts_df.loc[current_row.name, 'end_date'] = current_date
-                
-                # Insert new record
-                new_row['start_date'] = current_date
-                new_row['end_date'] = None
-                new_row['is_current'] = True
-                dim_accounts_df = dim_accounts_df.append(new_row, ignore_index=True)
-    
-    return dim_accounts_df
-
-# Example usage
-dim_accounts_df = pd.DataFrame(columns=[
-    'surrogate_key', 'account_id', 'account_name', 'account_type', 'on_budget', 'closed', 'note', 
-    'balance', 'cleared_balance', 'uncleared_balance', 'deleted', 'start_date', 'end_date', 'is_current'
-])
-
-new_data_df = pd.DataFrame([
-    {'account_id': 1, 'account_name': 'Checking Account', 'account_type': 'checking', 'on_budget': True, 'closed': False, 'note': '', 'balance': 1000.00, 'cleared_balance': 1000.00, 'uncleared_balance': 0.00, 'deleted': False},
-    {'account_id': 2, 'account_name': 'Savings Account', 'account_type': 'savings', 'on_budget': True, 'closed': False, 'note': '', 'balance': 5000.00, 'cleared_balance': 5000.00, 'uncleared_balance': 0.00, 'deleted': False}
-])
-
-dim_accounts_df = handle_scd_type_2(dim_accounts_df, new_data_df)