Module: SpatialFeatures::ClassMethods
- Defined in:
- lib/spatial_features/has_spatial_features.rb
Instance Method Summary collapse
- #acts_like_spatial_features? ⇒ Boolean
- #aggregate_features ⇒ Object
- #area_in_square_meters ⇒ Object
- #features ⇒ Object
-
#features_cache_key ⇒ Object
Add methods to generate cache keys for a record or all records of this class NOTE: features are never updated, only deleted and created, therefore we can tell if they have changed by finding the maximum id and count instead of needing timestamps.
-
#has_features_area? ⇒ Boolean
Returns true if the model stores a cache of the features area.
-
#has_spatial_features_hash? ⇒ Boolean
Returns true if the model stores a hash of the features so we don’t need to process the features if they haven’t changed.
- #intersecting(other, options = {}) ⇒ Object
- #lines ⇒ Object
- #points ⇒ Object
- #polygons ⇒ Object
- #within_buffer(other, buffer_in_meters = 0, options = {}) ⇒ Object
Instance Method Details
#acts_like_spatial_features? ⇒ Boolean
35 36 37 |
# File 'lib/spatial_features/has_spatial_features.rb', line 35 def acts_like_spatial_features? true end |
#aggregate_features ⇒ Object
84 85 86 87 88 89 90 91 |
# File 'lib/spatial_features/has_spatial_features.rb', line 84 def aggregate_features type = base_class.to_s # Rails stores polymorphic foreign keys as the base class if all == unscoped AggregateFeature.where(:spatial_model_type => type) else AggregateFeature.where(:spatial_model_type => type, :spatial_model_id => all.unscope(:select)) end end |
#area_in_square_meters ⇒ Object
103 104 105 |
# File 'lib/spatial_features/has_spatial_features.rb', line 103 def area_in_square_meters features.area_in_square_meters end |
#features ⇒ Object
75 76 77 78 79 80 81 82 |
# File 'lib/spatial_features/has_spatial_features.rb', line 75 def features type = base_class.to_s # Rails stores polymorphic foreign keys as the base class if all == unscoped Feature.where(:spatial_model_type => type) else Feature.where(:spatial_model_type => type, :spatial_model_id => all.unscope(:select)) end end |
#features_cache_key ⇒ Object
Add methods to generate cache keys for a record or all records of this class NOTE: features are never updated, only deleted and created, therefore we can tell if they have changed by finding the maximum id and count instead of needing timestamps
42 43 44 45 |
# File 'lib/spatial_features/has_spatial_features.rb', line 42 def features_cache_key # Do two separate queries because it is much faster for some reason "#{name}/#{features.cache_key}" end |
#has_features_area? ⇒ Boolean
Returns true if the model stores a cache of the features area
99 100 101 |
# File 'lib/spatial_features/has_spatial_features.rb', line 99 def has_features_area? column_names.include? 'features_area' end |
#has_spatial_features_hash? ⇒ Boolean
Returns true if the model stores a hash of the features so we don’t need to process the features if they haven’t changed
94 95 96 |
# File 'lib/spatial_features/has_spatial_features.rb', line 94 def has_spatial_features_hash? column_names.include? 'features_hash' end |
#intersecting(other, options = {}) ⇒ Object
47 48 49 |
# File 'lib/spatial_features/has_spatial_features.rb', line 47 def intersecting(other, = {}) within_buffer(other, 0, ) end |
#lines ⇒ Object
67 68 69 |
# File 'lib/spatial_features/has_spatial_features.rb', line 67 def lines features.lines end |
#points ⇒ Object
71 72 73 |
# File 'lib/spatial_features/has_spatial_features.rb', line 71 def points features.points end |
#polygons ⇒ Object
63 64 65 |
# File 'lib/spatial_features/has_spatial_features.rb', line 63 def polygons features.polygons end |
#within_buffer(other, buffer_in_meters = 0, options = {}) ⇒ Object
51 52 53 54 55 56 57 58 59 60 61 |
# File 'lib/spatial_features/has_spatial_features.rb', line 51 def within_buffer(other, buffer_in_meters = 0, = {}) return none if other.is_a?(ActiveRecord::Base) && other.new_record? # Cache only works on single records, not scopes. # This is because the cached intersection_area doesn't account for overlaps between the features in the scope. if [:cache] != false && other.is_a?(ActiveRecord::Base) cached_within_buffer_scope(other, buffer_in_meters, ) else uncached_within_buffer_scope(other, buffer_in_meters, ) end end |