exportDX2excel can't cope with multiple filters

[Ed McDonagh]

Export DX to CSV fails if multiple filters are found.

Task remapp.exports.dx_export.exportDX2excel[] raised unexpected: MultipleObjectsReturned('get() returned more than one XrayFilters -- it returned 2!',)

[Ed McDonagh]

Hopefully this fixes ref #430. Currently testing.

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[Ed McDonagh]

This needs to go out in a fix release

[Ed McDonagh]

MIssed one. Now works for xlsx. Refs #430

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[Ed McDonagh]

Both xlsx exports and csv exports tested with multiple filters. Fixes #430. Propose releasing as a bug fix release 0.7.4

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[Ed McDonagh]

Bringing ref #430 fix into develop

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[Ed McDonagh]

Rearranged the protocol sheet data gathering from that proposed by @LuukO. Reference to https://docs.djangoproject.com/en/1.10/ref/models/querysets/#all added by @LuukO would indicate fix for ref #430 is not suitable. Possibly need to check for .first() or stick with get() and check for MultipleObjectsReturned. Refs #442.

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[Ed McDonagh]

Fix wasn't appropriate.

[Ed McDonagh]

Removed concept of pre-testing to check for tables for DX csv export. Dropped use of export_safe too, using replace_comma instead. Might not have been a good idea as now have unicode errors so currently broken. Refs #430, #442

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[Ed McDonagh]

All unicode errors resolved. DX export to csv should now work more robustly! Need to see what is happening with filters on the skeletal survey example I have. Refs #430, #442

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[Ed McDonagh]

Commit fe5ba59 referenced this issue

[Ed McDonagh]

Removed use of replace_comma on each field in dx csv in favour of checking for commas just before writing the line. Refs #430, #442

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[Ed McDonagh]

Adding test files for ref #430

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[Ed McDonagh]

Adding start of test for ref #430

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[Ed McDonagh]

Added test of thickness values for ref #430

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[Ed McDonagh]

Factored out filter and filter_thickness value population to replace the three occurancers with one. Refs #454 for xlsx, already fixed for csv. Also fixes #430 for all three occurances in csv and xlsx. Test needs updating.

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[Ed McDonagh]

Changed name of get_filters to _get_xray_filterinfo to match rf version. Refs #430, #442

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[Ed McDonagh]

Added else to material list in case there is something odd recorded or there is a filter sequence but no material element. Refs #430

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[Ed McDonagh]

Adding ref #430 and #442 to changes

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[Ed McDonagh]

Adding ref #430 and #442 to changes

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[Ed McDonagh]

Throwing in a placeholder comment to release notes refs #430, #442

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[Ed McDonagh]

Merging issue430-442errorcatching back into develop. Fixes #442, refs #430,#449,#454,#458

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