{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Objects"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 22,
   "metadata": {
    "collapsed": false,
    "slideshow": {
     "slide_type": "-"
    }
   },
   "outputs": [],
   "source": [
    "class Author(object):\n",
    "    MALE = 'mr'\n",
    "    FEMALE = 'ms'\n",
    "    \n",
    "    def __init__(self, is_manning, name, email, gender):\n",
    "        self.is_manning = is_manning # штатный автор\n",
    "        self.name = name\n",
    "        self.email = email\n",
    "        self.gender = gender\n",
    "\n",
    "    def __repr__(self):\n",
    "        return \"{}.{} mailto: {} {}\".format(\n",
    "            self.gender, \n",
    "            self.name, \n",
    "            self.email, \n",
    "            'S' if self.is_manning else 'NS')\n",
    "\n",
    "\n",
    "class Publisher(object):\n",
    "    def __init__(self, name, index, email):\n",
    "        self.name = name\n",
    "        self.index = index\n",
    "        self.email = email\n",
    "\n",
    "    def __repr__(self):\n",
    "        return \"{} ({}) mailto: {}\".format(self.name, self.index, self.email)\n",
    "\n",
    "\n",
    "class Book(object):\n",
    "    def __init__(self, name, publisher, authors=None):\n",
    "        self.name = name\n",
    "        self.publisher = publisher\n",
    "        self.authors = authors or []\n",
    "\n",
    "    def __repr__(self):\n",
    "        return \"{}, {}, {}\".format(\n",
    "            self.name, self.publisher, \", \".join(x.name for x in self.authors))"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Factories"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 23,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
   "source": [
    "import string\n",
    "import factory\n",
    "import datetime\n",
    "import faker\n",
    "from factory import fuzzy\n",
    "\n",
    "faker = faker.Factory.create()\n",
    "\n",
    "\n",
    "class AuthorFactory(factory.Factory):\n",
    "    class Meta:\n",
    "        model = Author\n",
    "        inline_args = ('is_manning',)\n",
    "\n",
    "    name = factory.LazyAttribute(lambda o: '{} {}'.format(faker.first_name(), faker.last_name()))\n",
    "    # можно использовать декоратор @lazy_attribute\n",
    "    email = factory.LazyAttribute(lambda o: '{}@authors.com'.format(o.name.lower().replace(' ', '_')))\n",
    "    # можно использовать декоратор @factory.iterator\n",
    "    gender = factory.Iterator([Author.MALE, Author.FEMALE])\n",
    "    is_manning = False\n",
    "    \n",
    "    \n",
    "class FemaleAuthorFactory(AuthorFactory):\n",
    "    \n",
    "    gender = Author.FEMALE\n",
    "\n",
    "\n",
    "class PublisherFactory(factory.Factory):\n",
    "    class Meta:\n",
    "        model = Publisher\n",
    "    # можно использовать декоратор @factory.sequence\n",
    "    name = factory.Sequence(lambda n: 'Publisher_{}'.format(n))\n",
    "    index = fuzzy.FuzzyText(length=6, chars=string.digits, prefix='i_')\n",
    "    # можно использовать декоратор @factory.lazy_attribute_sequence\n",
    "    email = factory.LazyAttributeSequence(\n",
    "        lambda o, n: '{}@{}.publisher.com'.format(\n",
    "            o.name.lower(),\n",
    "            n\n",
    "        ))\n",
    "\n",
    "\n",
    "class BookFactory(factory.Factory):\n",
    "    class Meta:\n",
    "        model = Book\n",
    "        exclude = ('now',)\n",
    "        \n",
    "    # служебное поле\n",
    "    now = factory.LazyAttribute(lambda o: datetime.datetime.now())\n",
    "    name = factory.Sequence(lambda n: 'Book_{}'.format(n))\n",
    "    publisher = factory.SubFactory(PublisherFactory)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Примеры"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 24,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "mr.Derl Von mailto: derl_von@authors.com NS"
      ]
     },
     "execution_count": 24,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "AuthorFactory()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 25,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "ms.Tennessee Glover mailto: tennessee_glover@authors.com NS"
      ]
     },
     "execution_count": 25,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "FemaleAuthorFactory()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 26,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Book_0, Publisher_0 (i_156333) mailto: publisher_0@0.publisher.com, \n",
      "False\n"
     ]
    }
   ],
   "source": [
    "a = BookFactory()\n",
    "print a\n",
    "print hasattr(a, 'now')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 27,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "Book_1, Publisher_1 (i_994439) mailto: publisher_1@1.publisher.com, "
      ]
     },
     "execution_count": 27,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "BookFactory.build()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 28,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "Book_2, Publisher_2 (i_117052) mailto: publisher_2@2.publisher.com, "
      ]
     },
     "execution_count": 28,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "BookFactory.create()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 29,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "{'name': 'Book_3',\n",
       " 'now': datetime.datetime(2015, 5, 16, 7, 36, 16, 394600),\n",
       " 'publisher': Publisher_3 (i_123236) mailto: publisher_3@3.publisher.com}"
      ]
     },
     "execution_count": 29,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "BookFactory.attributes()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 30,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
   "source": [
    "BookFactory.reset_sequence()\n",
    "PublisherFactory.reset_sequence()\n",
    "AuthorFactory.reset_sequence()\n",
    "AuthorFactory.gender.reset()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 31,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "# Publisher #\n",
      "Publisher_0 (i_374114) mailto: publisher_0@0.publisher.com\n",
      "\n",
      "# Authors #\n",
      "[mr.Jayda Torphy mailto: jayda_torphy@authors.com NS, ms.Octavio Kunze mailto: octavio_kunze@authors.com NS, mr.Loren Stroman mailto: loren_stroman@authors.com NS]\n",
      "\n",
      "# Book #\n",
      "Book_0, Publisher_0 (i_374114) mailto: publisher_0@0.publisher.com, Jayda Torphy, Octavio Kunze, Loren Stroman\n",
      "\n"
     ]
    }
   ],
   "source": [
    "publisher = PublisherFactory()\n",
    "authors = AuthorFactory.create_batch(3)\n",
    "print '# Publisher #'\n",
    "print publisher\n",
    "print ''\n",
    "print '# Authors #'\n",
    "print authors\n",
    "print ''\n",
    "print '# Book #'\n",
    "print BookFactory(publisher=publisher, authors=authors)\n",
    "print ''"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Добавление провайдера в faker"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 32,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'bar'"
      ]
     },
     "execution_count": 32,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "from faker import Faker\n",
    "fake = Faker()\n",
    "# инициализируем генератор случайных чисел\n",
    "fake.seed(4321)\n",
    "\n",
    "from faker.providers import BaseProvider\n",
    "\n",
    "class MyProvider(BaseProvider):\n",
    "    def foo(self):\n",
    "        return 'bar'\n",
    "\n",
    "fake.add_provider(MyProvider)\n",
    "\n",
    "fake.foo()"
   ]
  }
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