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annotate rhodecode/model/__init__.py @ 1845:a048d0c6da3c beta

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fixed show inline comments, broken after some html refactoring
author Marcin Kuzminski <marcin@python-works.com>
date Sat, 07 Jan 2012 22:22:16 +0200
parents 89efedac4e6c
children a76e9bacbedc
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1 # -*- coding: utf-8 -*-
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2 """
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3 rhodecode.model.__init__
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4 ~~~~~~~~~~~~~~~~~~~~~~~~
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5
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6 The application's model objects
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7
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8 :created_on: Nov 25, 2010
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9 :author: marcink
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10 :copyright: (C) 2010-2012 Marcin Kuzminski <marcin@python-works.com>
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11 :license: GPLv3, see COPYING for more details.
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13
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14 :example:
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15
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16 .. code-block:: python
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17
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18 from paste.deploy import appconfig
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19 from pylons import config
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20 from sqlalchemy import engine_from_config
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21 from rhodecode.config.environment import load_environment
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22
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23 conf = appconfig('config:development.ini', relative_to = './../../')
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24 load_environment(conf.global_conf, conf.local_conf)
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25
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26 engine = engine_from_config(config, 'sqlalchemy.')
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27 init_model(engine)
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28 # RUN YOUR CODE HERE
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29
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30 """
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31 # This program is free software: you can redistribute it and/or modify
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32 # it under the terms of the GNU General Public License as published by
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33 # the Free Software Foundation, either version 3 of the License, or
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34 # (at your option) any later version.
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35 #
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36 # This program is distributed in the hope that it will be useful,
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37 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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38 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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39 # GNU General Public License for more details.
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40 #
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41 # You should have received a copy of the GNU General Public License
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42 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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43
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44 import logging
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45
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46 from rhodecode.model import meta
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47
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48 log = logging.getLogger(__name__)
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49
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50
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51 def init_model(engine):
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52 """
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53 Initializes db session, bind the engine with the metadata,
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54 Call this before using any of the tables or classes in the model,
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55 preferably once in application start
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56
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57 :param engine: engine to bind to
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58 """
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59 log.info("initializing db for %s", engine)
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60 meta.Base.metadata.bind = engine
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61
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62
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63 class BaseModel(object):
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64 """
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65 Base Model for all RhodeCode models, it adds sql alchemy session
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66 into instance of model
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67
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68 :param sa: If passed it reuses this session instead of creating a new one
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69 """
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70
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71 def __init__(self, sa=None):
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72 if sa is not None:
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73 self.sa = sa
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74 else:
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75 self.sa = meta.Session
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76
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77 def _get_instance(self, cls, instance):
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78 """
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79 Get's instance of given cls using some simple lookup mechanism
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80
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81 :param cls: class to fetch
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82 :param instance: int or Instance
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83 """
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84
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85 if isinstance(instance, cls):
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86 return instance
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87 elif isinstance(instance, int) or str(instance).isdigit():
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88 return cls.get(instance)
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89 else:
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90 if instance:
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91 raise Exception('given object must be int or Instance'
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92 ' of %s got %s' % (type(cls), type(instance)))