stress_at_work_analysis/config/ORMtutorial.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'1.3.21'"
      ]
     },
     "execution_count": 1,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "import sqlalchemy\n",
    "sqlalchemy.__version__ "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [],
   "source": [
    "from sqlalchemy import create_engine\n",
    "engine = create_engine('sqlite:///:memory:', echo=True)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [],
   "source": [
    "from sqlalchemy.ext.declarative import declarative_base\n",
    "Base = declarative_base()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [],
   "source": [
    "from sqlalchemy import Column, Integer, String\n",
    "class User(Base):\n",
    "    __tablename__ = 'users'\n",
    "\n",
    "    id = Column(Integer, primary_key=True)\n",
    "    name = Column(String)\n",
    "    fullname = Column(String)\n",
    "    nickname = Column(String)\n",
    "\n",
    "    def __repr__(self):\n",
    "        return \"<User(name='%s', fullname='%s', nickname='%s')>\" % (\n",
    "            self.name, self.fullname, self.nickname)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "Table('users', MetaData(bind=None), Column('id', Integer(), table=<users>, primary_key=True, nullable=False), Column('name', String(), table=<users>), Column('fullname', String(), table=<users>), Column('nickname', String(), table=<users>), schema=None)"
      ]
     },
     "execution_count": 5,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "User.__table__ "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "2020-12-24 16:40:37,230 INFO sqlalchemy.engine.base.Engine SELECT CAST('test plain returns' AS VARCHAR(60)) AS anon_1\n",
      "2020-12-24 16:40:37,236 INFO sqlalchemy.engine.base.Engine ()\n",
      "2020-12-24 16:40:37,239 INFO sqlalchemy.engine.base.Engine SELECT CAST('test unicode returns' AS VARCHAR(60)) AS anon_1\n",
      "2020-12-24 16:40:37,240 INFO sqlalchemy.engine.base.Engine ()\n",
      "2020-12-24 16:40:37,242 INFO sqlalchemy.engine.base.Engine PRAGMA main.table_info(\"users\")\n",
      "2020-12-24 16:40:37,242 INFO sqlalchemy.engine.base.Engine ()\n",
      "2020-12-24 16:40:37,244 INFO sqlalchemy.engine.base.Engine PRAGMA temp.table_info(\"users\")\n",
      "2020-12-24 16:40:37,245 INFO sqlalchemy.engine.base.Engine ()\n",
      "2020-12-24 16:40:37,246 INFO sqlalchemy.engine.base.Engine \n",
      "CREATE TABLE users (\n",
      "\tid INTEGER NOT NULL, \n",
      "\tname VARCHAR, \n",
      "\tfullname VARCHAR, \n",
      "\tnickname VARCHAR, \n",
      "\tPRIMARY KEY (id)\n",
      ")\n",
      "\n",
      "\n",
      "2020-12-24 16:40:37,247 INFO sqlalchemy.engine.base.Engine ()\n",
      "2020-12-24 16:40:37,248 INFO sqlalchemy.engine.base.Engine COMMIT\n"
     ]
    }
   ],
   "source": [
    "Base.metadata.create_all(engine)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "ed\n",
      "edsnickname\n",
      "None\n"
     ]
    }
   ],
   "source": [
    "ed_user = User(name='ed', fullname='Ed Jones', nickname='edsnickname')\n",
    "print(ed_user.name)\n",
    "print(ed_user.nickname)\n",
    "print(str(ed_user.id))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "from sqlalchemy.orm import sessionmaker\n",
    "Session = sessionmaker(bind=engine)\n",
    "session = Session()"
   ]
  }
 ],
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