FloatField with null=True and is not imported properly when value is null unless default exists

[dlparker]

error looks like this:

restoring WeightLimits
OrderedDict([(u'id', u'4'), (u'source_doc', u'5'), (u'created', u'2016-04-05 00:07:29'), (u'modified', u'2016-04-05 00:07:29'), (u'by_user', u'legacy'), (u'units', u'us'), (u'max_takeoff_weight', u''), (u'max_fuel_load', u''), (u'max_payload', u''), (u'empty_weight', u''), (u'VFR_day_reserves', u''), (u'VFR_night_reserves', u''), (u'IFR_100nm_reserves', u'734'), (u'IFR_200nm_reserves', u'946'), (u'IFR_300nm_reserves', u'1132'), (u'NBAA_100nm_reserves', u'641'), (u'NBAA_200nm_reserves', u'851'), (u'NBAA_300nm_reserves', u'1035')]) could not convert string to float: 

where max_fuel_load is the float field. If I add "default=None" to the field declaration the error goes away. Note that several of the other fields with nulls are IntegerField and they work fine.

Tried this with both json and csv, no difference in behavior.

I have workarounds (use default or convert to integer) so it is low priority for me, others may feel differently.

[bmihelac]

this should be fixed, can you test and reopen if needed?