Update ofxrecord amount to valid monetary numeric type

We don't want no floats around here, this is money. This stuff matters.

I also took the time to align up my comments so they are purtier

alembic/versions/eac3a08698a7_fix_currency_type.py

@@ -0,0 +1,27 @@
+"""fix currency type
+
+Revision ID: eac3a08698a7
+Revises: 00f2b77f1d2c
+Create Date: 2016-07-01 11:54:56.272364
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = 'eac3a08698a7'
+down_revision = '00f2b77f1d2c'
+branch_labels = None
+depends_on = None
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    if not op.get_context().as_sql:
+        connection = op.get_bind()
+        connection.execution_options(isolation_level='AUTOCOMMIT')
+
+    op.execute('ALTER TABLE ofxrecord ALTER COLUMN amount TYPE NUMERIC(20, 2) USING amount::numeric;')
+
+def downgrade():
+    pass

vanth/tables.py

@@ -1,6 +1,6 @@
 import chryso.constants
-from sqlalchemy import (Column, Date, DateTime, Float, ForeignKey, Integer,
-                        MetaData, String, Table, UniqueConstraint, func, text)
+from sqlalchemy import (Column, Date, DateTime, ForeignKey, Integer, MetaData,
+                        Numeric, String, Table, UniqueConstraint, func, text)
 from sqlalchemy.dialects.postgresql import UUID
 
 metadata = MetaData(naming_convention=chryso.constants.CONVENTION)
@@ -66,7 +66,7 @@ OFXUpdate = table('ofxupdate',
 )
 
 OFXRecord = table('ofxrecord',
-    Column('amount',            Float(),        nullable=False), # The amount of the record, like -177.91
+    Column('amount',            Numeric(precision=20, scale=2, asdecimal=True), nullable=False), # The amount of the record, like -177.91
     Column('available',         Date(),         nullable=True),  # The date the record was available
     Column('fid',               String(255),    nullable=False), # The Financial institution's ID
     Column('name',              String(1024),   nullable=False), # The name of the record, like 'UT SLC SAMSCLUB #4719'