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Timestamp:
03/10/08 16:13:52 (9 months ago)
Author:
jbronn
Message:

gis: LayerMapping: OGR string fields may now be coerced into Django IntegerField; added support for more Django field types.

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  • django/branches/gis/django/contrib/gis/utils/layermapping.py

    r7028 r7214  
    99 into a GeoDjango model. 
    1010 
    11  This utility is still in early stages of development, so its usage 
    12  is subject to change -- please report any bugs. 
     11 Please report any bugs encountered using this utility. 
    1312 
    1413 Requirements:  OGR C Library (from GDAL) required. 
    …… 
    112111from decimal import Decimal 
    113112from django.core.exceptions import ObjectDoesNotExist 
    114 from django.contrib.gis.db.models.fields import GeometryField 
     113from django.contrib.gis.db.models import GeometryField 
    115114from django.contrib.gis.db.backend import SpatialBackend 
    116115from django.contrib.gis.gdal import CoordTransform, DataSource, \ 
    …… 
    141140    FIELD_TYPES = { 
    142141        models.AutoField : OFTInteger, 
    143         models.IntegerField : (OFTInteger, OFTReal), 
     142        models.IntegerField : (OFTInteger, OFTReal, OFTString), 
    144143        models.FloatField : (OFTInteger, OFTReal), 
    145144        models.DateField : OFTDate, 
    146145        models.DateTimeField : OFTDateTime, 
     146        models.EmailField : OFTString, 
    147147        models.TimeField : OFTTime, 
    148148        models.DecimalField : (OFTInteger, OFTReal), 
    149149        models.CharField : OFTString, 
     150        models.SlugField : OFTString, 
    150151        models.TextField : OFTString, 
    151         models.SmallIntegerField : (OFTInteger, OFTReal), 
    152         models.PositiveSmallIntegerField : (OFTInteger, OFTReal), 
     152        models.URLField : OFTString, 
     153        models.USStateField : OFTString, 
     154        models.XMLField : OFTString, 
     155        models.SmallIntegerField : (OFTInteger, OFTReal, OFTString), 
     156        models.PositiveSmallIntegerField : (OFTInteger, OFTReal, OFTString), 
    153157        } 
    154158 
    …… 
    311315                # Is the OGR field in the Layer? 
    312316                idx = check_ogr_fld(ogr_name) 
    313                  
     317                ogr_field = ogr_field_types[idx] 
     318 
    314319                # Can the OGR field type be mapped to the Django field type? 
    315                 if not issubclass(ogr_field_types[idx], self.FIELD_TYPES[model_field.__class__]): 
     320                if not issubclass(ogr_field, self.FIELD_TYPES[model_field.__class__]): 
    316321                    raise LayerMapError('OGR field "%s" (of type %s) cannot be mapped to Django %s.' %  
    317                                         (ogr_field, ogr_field_types[idx].__name__, fld_name)) 
     322                                        (ogr_field, ogr_field.__name__, fld_name)) 
    318323                fields_val = model_field 
    319324         
    …… 
    398403        otherwise the proper exception is raised. 
    399404        """ 
    400         if isinstance(ogr_field, OFTString): 
     405        if (isinstance(ogr_field, OFTString) and  
     406            isinstance(model_field, (models.CharField, models.TextField))):  
    401407            if self.encoding: 
    402408                # The encoding for OGR data sources may be specified here 
    …… 
    436442                                     (model_field.max_digits, model_field.decimal_places, max_prec)) 
    437443            val = d 
    438         elif isinstance(ogr_field, OFTReal) and isinstance(model_field, models.IntegerField): 
    439             # If there's an OFTReal field with precision greater than 0 is mapped to 
    440             # an IntegerField, the decimal places will be truncated. 
     444        elif isinstance(ogr_field, (OFTReal, OFTString)) and isinstance(model_field, models.IntegerField): 
     445            # Attempt to convert any OFTReal and OFTString value to an OFTInteger. 
    441446            try: 
    442447                val = int(ogr_field.value)