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1 #!/usr/bin/python2.5 |
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2 # |
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3 # Copyright 2008 the Melange authors. |
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4 # |
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5 # Licensed under the Apache License, Version 2.0 (the "License"); |
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6 # you may not use this file except in compliance with the License. |
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7 # You may obtain a copy of the License at |
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8 # |
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9 # http://www.apache.org/licenses/LICENSE-2.0 |
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10 # |
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11 # Unless required by applicable law or agreed to in writing, software |
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12 # distributed under the License is distributed on an "AS IS" BASIS, |
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13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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14 # See the License for the specific language governing permissions and |
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15 # limitations under the License. |
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16 |
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17 """Group (Model) query functions. |
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18 """ |
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19 |
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20 __authors__ = [ |
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21 '"Sverre Rabbelier" <sverre@rabbelier.nl>', |
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22 ] |
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23 |
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24 |
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25 from soc.logic.models import base |
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26 |
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27 import soc.models.group |
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28 |
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29 |
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30 class Logic(base.Logic): |
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31 """Logic methods for the Group model. |
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32 """ |
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33 |
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34 def __init__(self, model=soc.models.group.Group, base_model=None): |
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35 """Defines the name, key_name and model for this entity. |
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36 """ |
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37 base.Logic.__init__(self, model, base_model=base_model) |
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38 |
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39 def getKeyValues(self, entity): |
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40 """Extracts the key values from entity and returns them. |
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41 |
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42 The default implementation for Groups assumes that the Group is site-wide |
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43 and thus has no scope. Such Groups include Sponsors and Clubs. Any |
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44 Group that exists per-Program or per-Year will need to override this |
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45 method. |
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46 |
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47 Args: |
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48 entity: the entity from which to extract the key values |
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49 """ |
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50 |
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51 return [entity.link_id] |
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52 |
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53 def getKeyValuesFromFields(self, fields): |
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54 """Extracts the key values from a dict and returns them. |
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55 |
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56 The default implementation for Groups assumes that the Group is site-wide |
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57 and thus has no scope. Such Groups include Sponsors and Clubs. Any |
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58 Group that exists per-Program or per-Year will need to override this |
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59 method. |
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60 |
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61 Args: |
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62 fields: the dict from which to extract the key values |
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63 """ |
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64 |
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65 return [fields['link_id']] |
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66 |
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67 def getKeyFieldNames(self): |
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68 """Returns an array with the names of the Key Fields. |
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69 |
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70 The default implementation for Groups assumes that the Group is site-wide |
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71 and thus has no scope. Such Groups include Sponsors and Clubs. Any |
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72 Group that exists per-Program or per-Year will need to override this |
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73 method. |
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74 """ |
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75 |
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76 return ['link_id'] |
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77 |
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78 |
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79 def isDeletable(self, entity): |
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80 """Returns whether the specified Group entity can be deleted. |
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81 |
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82 Generically, a Group can always be deleted. Subclasses of group.Logic |
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83 should add their own deletion prerequisites. |
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84 |
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85 Args: |
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86 entity: an existing Group entity in the Datastore |
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87 """ |
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88 |
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89 return True |
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90 |
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91 |
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92 logic = Logic() |