Module: SpatialFeatures::InstanceMethods
- Defined in:
- lib/spatial_features/has_spatial_features.rb
Instance Method Summary collapse
- #acts_like_spatial_features? ⇒ Boolean
-
#aggregate_features ⇒ Object
Scope to perform SQL-only calculations on a record’s aggregate feature.
- #bounds ⇒ Object
- #features? ⇒ Boolean
- #features_area_in_square_meters ⇒ Object
- #features_cache_key ⇒ Object
- #intersects?(other) ⇒ Boolean
- #lines? ⇒ Boolean
- #points? ⇒ Boolean
- #polygons? ⇒ Boolean
- #spatial_cache_for?(other, buffer_in_meters) ⇒ Boolean
- #total_intersection_area_in_square_meters(other) ⇒ Object
- #total_intersection_area_percentage(klass) ⇒ Object
Instance Method Details
#acts_like_spatial_features? ⇒ Boolean
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# File 'lib/spatial_features/has_spatial_features.rb', line 186 def acts_like_spatial_features? true end |
#aggregate_features ⇒ Object
Scope to perform SQL-only calculations on a record’s aggregate feature. This avoids loading the large data payload if all that is needed is metadata
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# File 'lib/spatial_features/has_spatial_features.rb', line 266 def aggregate_features self.class.where(id: id).aggregate_features end |
#bounds ⇒ Object
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# File 'lib/spatial_features/has_spatial_features.rb', line 218 def bounds @bounds ||= if has_attribute?(:north) && has_attribute?(:east) && has_attribute?(:south) && has_attribute?(:west) slice(:north, :east, :south, :west).with_indifferent_access.transform_values!(&:to_f) elsif association(:aggregate_feature).loaded? # Aggregate features can be very large and take a while to load. Avoid loading one just to load the bounds. aggregate_feature&.bounds else aggregate_features.bounds end end |
#features? ⇒ Boolean
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# File 'lib/spatial_features/has_spatial_features.rb', line 206 def features? if features.loaded? features.present? else features.exists? end end |
#features_area_in_square_meters ⇒ Object
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# File 'lib/spatial_features/has_spatial_features.rb', line 236 def features_area_in_square_meters @features_area_in_square_meters ||= if has_attribute?(:area) area elsif association(:aggregate_feature).loaded? aggregate_feature&.area else aggregate_features.pluck(:area).first end end |
#features_cache_key ⇒ Object
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# File 'lib/spatial_features/has_spatial_features.rb', line 190 def features_cache_key "#{self.class.name}/#{id}-#{has_spatial_features_hash? ? features_hash : (aggregate_feature || features).cache_key}" end |
#intersects?(other) ⇒ Boolean
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# File 'lib/spatial_features/has_spatial_features.rb', line 214 def intersects?(other) self.class.unscoped { self.class.intersecting(other).exists?(id) } end |
#lines? ⇒ Boolean
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# File 'lib/spatial_features/has_spatial_features.rb', line 198 def lines? !features.lines.empty? end |
#points? ⇒ Boolean
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# File 'lib/spatial_features/has_spatial_features.rb', line 202 def points? !features.points.empty? end |
#polygons? ⇒ Boolean
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# File 'lib/spatial_features/has_spatial_features.rb', line 194 def polygons? !features.polygons.empty? end |
#spatial_cache_for?(other, buffer_in_meters) ⇒ Boolean
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# File 'lib/spatial_features/has_spatial_features.rb', line 253 def spatial_cache_for?(other, buffer_in_meters) if cache = spatial_caches.between(self, Utils.class_of(other)).first return cache.intersection_cache_distance.nil? if buffer_in_meters.nil? # cache must be total if no buffer_in_meters return false if cache.stale? # cache must be for current features return true if cache.intersection_cache_distance.nil? # always good if cache is total return buffer_in_meters <= cache.intersection_cache_distance else return false end end |
#total_intersection_area_in_square_meters(other) ⇒ Object
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# File 'lib/spatial_features/has_spatial_features.rb', line 247 def total_intersection_area_in_square_meters(other) other = other.intersecting(self) unless other.is_a?(ActiveRecord::Base) return features.area if spatial_cache_for?(other, 0) && SpatialProximity.between(self, other).where('intersection_area_in_square_meters >= ?', features.area).exists? return features.total_intersection_area_in_square_meters(other.features) end |
#total_intersection_area_percentage(klass) ⇒ Object
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# File 'lib/spatial_features/has_spatial_features.rb', line 230 def total_intersection_area_percentage(klass) return 0.0 unless features_area_in_square_meters > 0 ((total_intersection_area_in_square_meters(klass) / features_area_in_square_meters) * 100).round(1) end |