0.3(добавление функции добавки блюда)

default_project/dbtable.py

@@ -0,0 +1,86 @@
+# Базовые действия с таблицами
+
+from dbconnection import *
+
+class DbTable:
+    dbconn = None
+
+    def __init__(self):
+        return
+
+    def table_name(self):
+        return self.dbconn.prefix + "table"
+
+    def columns(self):
+        return {"test": ["integer", "PRIMARY KEY"]}
+
+    def column_names(self):
+        return sorted(self.columns().keys(), key = lambda x: x)
+
+    def primary_key(self):
+        return ['id']
+
+    def column_names_without_id(self):
+        res = sorted(self.columns().keys(), key = lambda x: x)
+        if 'id' in res:
+            res.remove('id')
+        return res
+
+    def table_constraints(self):
+        return []
+
+    def create(self):
+        sql = "CREATE TABLE " + self.table_name() + "("
+        arr = [k + " " + " ".join(v) for k, v in sorted(self.columns().items(), key = lambda x: x[0])]
+        sql += ", ".join(arr + self.table_constraints())
+        sql += ")"
+        cur = self.dbconn.conn.cursor()
+        cur.execute(sql)
+        self.dbconn.conn.commit()
+        return
+
+    def drop(self):
+        sql = "DROP TABLE IF EXISTS " + self.table_name()
+        cur = self.dbconn.conn.cursor()
+        cur.execute(sql)
+        self.dbconn.conn.commit()
+        return
+
+    def insert_one(self, vals):
+        for i in range(0, len(vals)):
+            if type(vals[i]) == str:
+                vals[i] = "'" + vals[i] + "'"
+            else:
+                vals[i] = str(vals[i])
+        sql = "INSERT INTO " + self.table_name() + "("
+        sql += ", ".join(self.column_names_without_id()) + ") VALUES("
+        sql += ", ".join(vals) + ")"
+        cur = self.dbconn.conn.cursor()
+        cur.execute(sql)
+        self.dbconn.conn.commit()
+        return
+
+    def first(self):
+        sql = "SELECT * FROM " + self.table_name()
+        sql += " ORDER BY "
+        sql += ", ".join(self.primary_key())
+        cur = self.dbconn.conn.cursor()
+        cur.execute(sql)
+        return cur.fetchone()        
+
+    def last(self):
+        sql = "SELECT * FROM " + self.table_name()
+        sql += " ORDER BY "
+        sql += ", ".join([x + " DESC" for x in self.primary_key()])
+        cur = self.dbconn.conn.cursor()
+        cur.execute(sql)
+        return cur.fetchone()
+
+    def all(self):
+        sql = "SELECT * FROM " + self.table_name()
+        sql += " ORDER BY "
+        sql += ", ".join(self.primary_key())
+        cur = self.dbconn.conn.cursor()
+        cur.execute(sql)
+        return cur.fetchall()        
+