1 | File fields exporter and importer sections |
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2 | ========================================== |
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3 | |
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4 | File fields importer and exporter sections are used to extract data from |
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5 | Archetypes file fields. The exporter section blueprint name is |
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6 | ``quintagroup.transmogrifier.fileexporter`` and the importer section blueprint |
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7 | name is ``quintagroup.transmogrifier.fileimporter``. |
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8 | |
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9 | Exporter needs relative path to the object, that have file fields. Improter |
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10 | needs path and data for updating fields. |
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11 | |
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12 | Both sections has ``path-key`` option which specify key in item where path to |
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13 | object is stored (``_path`` is default) and ``files-key`` option that gives |
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14 | key where XML data will be or is stored. Exporter section also has ``exclude-key`` |
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15 | option, that specifies key where list of file field names will be stored |
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16 | (default is ``_excluded_fields``). These list will be used in marshaller |
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17 | section. |
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18 | |
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19 | Also this section provides condition option which, if specified, exports/imports |
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20 | this or another binary field only if condition expression evaluates to true. |
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21 | |
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22 | >>> import pprint |
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23 | >>> binary = """ |
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24 | ... [transmogrifier] |
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25 | ... pipeline = |
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26 | ... binarysource |
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27 | ... fileexporter |
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28 | ... fileimporter |
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29 | ... printer |
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30 | ... dataprinter |
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31 | ... |
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32 | ... [binarysource] |
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33 | ... blueprint = quintagroup.transmogrifier.tests.binarysource |
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34 | ... |
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35 | ... [fileexporter] |
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36 | ... blueprint = quintagroup.transmogrifier.fileexporter |
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37 | ... condition = python:fname != 'image' |
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38 | ... |
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39 | ... [dataprinter] |
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40 | ... blueprint = quintagroup.transmogrifier.tests.dataprinter |
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41 | ... print = |
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42 | ... _files |
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43 | ... file-fields |
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44 | ... data |
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45 | ... |
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46 | ... [fileimporter] |
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47 | ... blueprint = quintagroup.transmogrifier.fileimporter |
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48 | ... |
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49 | ... [printer] |
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50 | ... blueprint = collective.transmogrifier.sections.tests.pprinter |
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51 | ... """ |
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52 | >>> registerConfig(u'quintagroup.transmogrifier.tests.marshall', binary) |
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53 | >>> transmogrifier(u'quintagroup.transmogrifier.tests.marshall') # doctest: +REPORT_NDIFF, +ELLIPSIS |
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54 | {} |
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55 | {'_path': 'not/existing/bar'} |
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56 | {'_path': 'spam/eggs/notatcontent'} |
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57 | {'_excluded_fields': ['image', 'file'], |
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58 | '_files': {'archive.tar.gz': {'content_type': 'application/x-tar', |
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59 | 'data': 'binary data', |
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60 | 'name': 'archive.tar.gz'}, |
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61 | 'file-fields': {'data': ..., |
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62 | 'name': '.file-fields.xml'}}, |
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63 | '_path': 'spam/eggs/foo'} |
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64 | <?xml version="1.0" encoding="utf-8"?> |
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65 | <manifest> |
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66 | <field name="file"> |
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67 | <filename> |
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68 | archive.tar.gz |
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69 | </filename> |
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70 | <mimetype> |
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71 | application/x-tar |
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72 | </mimetype> |
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73 | </field> |
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74 | </manifest> |
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75 | <BLANKLINE> |
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76 | >>> pprint.pprint(plone.updated) |
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77 | ('archive.tar.gz', 'application/x-tar', 'binary data') |
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78 | |
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79 | TODO: write test for getting data for fields from import context |
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80 | |
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81 | The ``condition`` expression hass access to the following: |
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82 | |
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83 | =================== ========================================================== |
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84 | ``item`` the current pipeline item |
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85 | ``transmogrifier`` the transmogrifier |
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86 | ``name`` the name of the splitter section |
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87 | ``options`` the splitter options |
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88 | ``modules`` sys.modules |
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89 | ``context`` the current content object |
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90 | ``fname`` the name of the field being processed |
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91 | ``filename`` the file name binary field is loaded into (import only) |
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92 | ``data`` data read from the file (import only) |
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93 | ``mimetype`` data mimetype (import only) |
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94 | =================== ========================================================== |
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