def test_textfield(self):
"Tests that String content fits also in a TextField"
mapping = copy(city_mapping)
mapping['name_txt'] = 'Name'
lm = LayerMapping(City, city_shp, mapping)
lm.save(silent=True, strict=True)
self.assertEqual(City.objects.count(), 3)
self.assertEqual(City.objects.all().order_by('name_txt')[0].name_txt, "Houston")
def test_layermap_strict(self):
"Testing the `strict` keyword, and import of a LineString shapefile."
# When the `strict` keyword is set an error encountered will force
# the importation to stop.
with self.assertRaises(InvalidDecimal):
lm = LayerMapping(Interstate, inter_shp, inter_mapping)
lm.save(silent=True, strict=True)
Interstate.objects.all().delete()
# This LayerMapping should work b/c `strict` is not set.
lm = LayerMapping(Interstate, inter_shp, inter_mapping)
lm.save(silent=True)
# Two interstate should have imported correctly.
self.assertEqual(2, Interstate.objects.count())
# Verifying the values in the layer w/the model.
ds = DataSource(inter_shp)
# Only the first two features of this shapefile are valid.
valid_feats = ds[0][:2]
for feat in valid_feats:
istate = Interstate.objects.get(name=feat['Name'].value)
if feat.fid == 0:
self.assertEqual(Decimal(str(feat['Length'])), istate.length)
elif feat.fid == 1:
# Everything but the first two decimal digits were truncated,
# because the Interstate model's `length` field has decimal_places=2.
self.assertAlmostEqual(feat.get('Length'), float(istate.length), 2)
for p1, p2 in zip(feat.geom, istate.path):
self.assertAlmostEqual(p1[0], p2[0], 6)
self.assertAlmostEqual(p1[1], p2[1], 6)
def test_test_fid_range_step(self):
"Tests the `fid_range` keyword and the `step` keyword of .save()."
# Function for clearing out all the counties before testing.
def clear_counties(): County.objects.all().delete()
State.objects.bulk_create([
State(name='Colorado'), State(name='Hawaii'), State(name='Texas')
])
# Initializing the LayerMapping object to use in these tests.
lm = LayerMapping(County, co_shp, co_mapping, transform=False, unique='name')
# Bad feature id ranges should raise a type error.
bad_ranges = (5.0, 'foo', co_shp)
for bad in bad_ranges:
self.assertRaises(TypeError, lm.save, fid_range=bad)
# Step keyword should not be allowed w/`fid_range`.
fr = (3, 5) # layer[3:5]
self.assertRaises(LayerMapError, lm.save, fid_range=fr, step=10)
lm.save(fid_range=fr)
# Features IDs 3 & 4 are for Galveston County, Texas -- only
# one model is returned because the `unique` keyword was set.
qs = County.objects.all()
self.assertEqual(1, qs.count())
self.assertEqual('Galveston', qs[0].name)
# Features IDs 5 and beyond for Honolulu County, Hawaii, and
# FID 0 is for Pueblo County, Colorado.
clear_counties()
lm.save(fid_range=slice(5, None), silent=True, strict=True) # layer[5:]
lm.save(fid_range=slice(None, 1), silent=True, strict=True) # layer[:1]
# Only Pueblo & Honolulu counties should be present because of
# the `unique` keyword. Have to set `order_by` on this QuerySet
# or else MySQL will return a different ordering than the other dbs.
qs = County.objects.order_by('name')
self.assertEqual(2, qs.count())
hi, co = tuple(qs)
hi_idx, co_idx = tuple(map(NAMES.index, ('Honolulu', 'Pueblo')))
self.assertEqual('Pueblo', co.name)
self.assertEqual(NUMS[co_idx], len(co.mpoly))
self.assertEqual('Honolulu', hi.name)
self.assertEqual(NUMS[hi_idx], len(hi.mpoly))
# Testing the `step` keyword -- should get the same counties
# regardless of we use a step that divides equally, that is odd,
# or that is larger than the dataset.
for st in (4,7,1000):
clear_counties()
lm.save(step=st, strict=True)
self.county_helper(county_feat=False)
def test_simple_layermap(self):
"Test LayerMapping import of a simple point shapefile."
# Setting up for the LayerMapping.
lm = LayerMapping(City, city_shp, city_mapping)
lm.save()
# There should be three cities in the shape file.
self.assertEqual(3, City.objects.count())
# Opening up the shapefile, and verifying the values in each
# of the features made it to the model.
ds = DataSource(city_shp)
layer = ds[0]
for feat in layer:
city = City.objects.get(name=feat['Name'].value)
self.assertEqual(feat['Population'].value, city.population)
self.assertEqual(Decimal(str(feat['Density'])), city.density)
self.assertEqual(feat['Created'].value, city.dt)
# Comparing the geometries.
pnt1, pnt2 = feat.geom, city.point
self.assertAlmostEqual(pnt1.x, pnt2.x, 5)
self.assertAlmostEqual(pnt1.y, pnt2.y, 5)
def test_model_inheritance(self):
"Tests LayerMapping on inherited models. See #12093."
icity_mapping = {'name' : 'Name',
'population' : 'Population',
'density' : 'Density',
'point' : 'POINT',
'dt' : 'Created',
}
# Parent model has geometry field.
lm1 = LayerMapping(ICity1, city_shp, icity_mapping)
lm1.save()
# Grandparent has geometry field.
lm2 = LayerMapping(ICity2, city_shp, icity_mapping)
lm2.save()
self.assertEqual(6, ICity1.objects.count())
self.assertEqual(3, ICity2.objects.count())
def test_invalid_layer(self):
"Tests LayerMapping on invalid geometries. See #15378."
invalid_mapping = {'point': 'POINT'}
lm = LayerMapping(Invalid, invalid_shp, invalid_mapping,
source_srs=4326)
lm.save(silent=True)
def test_layermap_unique_multigeometry_fk(self):
"Testing the `unique`, and `transform`, geometry collection conversion, and ForeignKey mappings."
# All the following should work.
try:
# Telling LayerMapping that we want no transformations performed on the data.
lm = LayerMapping(County, co_shp, co_mapping, transform=False)
# Specifying the source spatial reference system via the `source_srs` keyword.
lm = LayerMapping(County, co_shp, co_mapping, source_srs=4269)
lm = LayerMapping(County, co_shp, co_mapping, source_srs='NAD83')
# Unique may take tuple or string parameters.
for arg in ('name', ('name', 'mpoly')):
lm = LayerMapping(County, co_shp, co_mapping, transform=False, unique=arg)
except:
self.fail('No exception should be raised for proper use of keywords.')
# Testing invalid params for the `unique` keyword.
for e, arg in ((TypeError, 5.0), (ValueError, 'foobar'), (ValueError, ('name', 'mpolygon'))):
self.assertRaises(e, LayerMapping, County, co_shp, co_mapping, transform=False, unique=arg)
# No source reference system defined in the shapefile, should raise an error.
if not mysql:
self.assertRaises(LayerMapError, LayerMapping, County, co_shp, co_mapping)
# Passing in invalid ForeignKey mapping parameters -- must be a dictionary
# mapping for the model the ForeignKey points to.
bad_fk_map1 = copy(co_mapping); bad_fk_map1['state'] = 'name'
bad_fk_map2 = copy(co_mapping); bad_fk_map2['state'] = {'nombre' : 'State'}
self.assertRaises(TypeError, LayerMapping, County, co_shp, bad_fk_map1, transform=False)
self.assertRaises(LayerMapError, LayerMapping, County, co_shp, bad_fk_map2, transform=False)
# There exist no State models for the ForeignKey mapping to work -- should raise
# a MissingForeignKey exception (this error would be ignored if the `strict`
# keyword is not set).
lm = LayerMapping(County, co_shp, co_mapping, transform=False, unique='name')
self.assertRaises(MissingForeignKey, lm.save, silent=True, strict=True)
# Now creating the state models so the ForeignKey mapping may work.
State.objects.bulk_create([
State(name='Colorado'), State(name='Hawaii'), State(name='Texas')
])
# If a mapping is specified as a collection, all OGR fields that
# are not collections will be converted into them. For example,
# a Point column would be converted to MultiPoint. Other things being done
# w/the keyword args:
# `transform=False`: Specifies that no transform is to be done; this
# has the effect of ignoring the spatial reference check (because the
# county shapefile does not have implicit spatial reference info).
#
# `unique='name'`: Creates models on the condition that they have
# unique county names; geometries from each feature however will be
# appended to the geometry collection of the unique model. Thus,
# all of the various islands in Honolulu county will be in in one
# database record with a MULTIPOLYGON type.
lm = LayerMapping(County, co_shp, co_mapping, transform=False, unique='name')
lm.save(silent=True, strict=True)
# A reference that doesn't use the unique keyword; a new database record will
# created for each polygon.
lm = LayerMapping(CountyFeat, co_shp, cofeat_mapping, transform=False)
lm.save(silent=True, strict=True)
# The county helper is called to ensure integrity of County models.
self.county_helper()