Added modular DAL, updated gluon imports to new structure

gluon/dal/adapters/db2.py

@@ -0,0 +1,93 @@
+# -*- coding: utf-8 -*-
+import base64
+import datetime
+
+from .._globals import IDENTITY
+from .base import BaseAdapter
+
+
+class DB2Adapter(BaseAdapter):
+    drivers = ('pyodbc',)
+
+    types = {
+        'boolean': 'CHAR(1)',
+        'string': 'VARCHAR(%(length)s)',
+        'text': 'CLOB',
+        'json': 'CLOB',
+        'password': 'VARCHAR(%(length)s)',
+        'blob': 'BLOB',
+        'upload': 'VARCHAR(%(length)s)',
+        'integer': 'INT',
+        'bigint': 'BIGINT',
+        'float': 'REAL',
+        'double': 'DOUBLE',
+        'decimal': 'NUMERIC(%(precision)s,%(scale)s)',
+        'date': 'DATE',
+        'time': 'TIME',
+        'datetime': 'TIMESTAMP',
+        'id': 'INT GENERATED ALWAYS AS IDENTITY PRIMARY KEY NOT NULL',
+        'reference': 'INT, FOREIGN KEY (%(field_name)s) REFERENCES %(foreign_key)s ON DELETE %(on_delete_action)s',
+        'list:integer': 'CLOB',
+        'list:string': 'CLOB',
+        'list:reference': 'CLOB',
+        'big-id': 'BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY NOT NULL',
+        'big-reference': 'BIGINT, FOREIGN KEY (%(field_name)s) REFERENCES %(foreign_key)s ON DELETE %(on_delete_action)s',
+        'reference FK': ', CONSTRAINT FK_%(constraint_name)s FOREIGN KEY (%(field_name)s) REFERENCES %(foreign_key)s ON DELETE %(on_delete_action)s',
+        'reference TFK': ' CONSTRAINT FK_%(foreign_table)s_PK FOREIGN KEY (%(field_name)s) REFERENCES %(foreign_table)s (%(foreign_key)s) ON DELETE %(on_delete_action)s',
+        }
+
+    def LEFT_JOIN(self):
+        return 'LEFT OUTER JOIN'
+
+    def RANDOM(self):
+        return 'RAND()'
+
+    def select_limitby(self, sql_s, sql_f, sql_t, sql_w, sql_o, limitby):
+        if limitby:
+            (lmin, lmax) = limitby
+            sql_o += ' FETCH FIRST %i ROWS ONLY' % lmax
+        return 'SELECT %s %s FROM %s%s%s;' % (sql_s, sql_f, sql_t, sql_w, sql_o)
+
+    def represent_exceptions(self, obj, fieldtype):
+        if fieldtype == 'blob':
+            obj = base64.b64encode(str(obj))
+            return "BLOB('%s')" % obj
+        elif fieldtype == 'datetime':
+            if isinstance(obj, datetime.datetime):
+                obj = obj.isoformat()[:19].replace('T','-').replace(':','.')
+            elif isinstance(obj, datetime.date):
+                obj = obj.isoformat()[:10]+'-00.00.00'
+            return "'%s'" % obj
+        return None
+
+    def __init__(self,db,uri,pool_size=0,folder=None,db_codec ='UTF-8',
+                 credential_decoder=IDENTITY, driver_args={},
+                 adapter_args={}, do_connect=True, after_connection=None):
+        self.db = db
+        self.dbengine = "db2"
+        self.uri = uri
+        if do_connect: self.find_driver(adapter_args,uri)
+        self.pool_size = pool_size
+        self.folder = folder
+        self.db_codec = db_codec
+        self._after_connection = after_connection
+        self.find_or_make_work_folder()
+        ruri = uri.split('://', 1)[1]
+        def connector(cnxn=ruri,driver_args=driver_args):
+            return self.driver.connect(cnxn,**driver_args)
+        self.connector = connector
+        if do_connect: self.reconnect()
+
+    def execute(self,command):
+        if command[-1:]==';':
+            command = command[:-1]
+        return self.log_execute(command)
+
+    def lastrowid(self,table):
+        self.execute('SELECT DISTINCT IDENTITY_VAL_LOCAL() FROM %s;' % table)
+        return long(self.cursor.fetchone()[0])
+
+    def rowslice(self,rows,minimum=0,maximum=None):
+        if maximum is None:
+            return rows[minimum:]
+        return rows[minimum:maximum]