#3163 Don't include the DwcOccurrence id column in DwC exports

app/models/dwc_occurrence.rb

@@ -188,7 +188,7 @@ def self.target_columns
   # @return [Array]
   #   of symbols
   def self.excluded_columns
-    ::DwcOccurrence.columns.collect{|c| c.name.to_sym} - (self.target_columns - [:dwc_occurrence_object_id, :dwc_occurrence_object_type])
+    ::DwcOccurrence.columns.collect{|c| c.name.to_sym} - (self.target_columns - [:id, :dwc_occurrence_object_id, :dwc_occurrence_object_type])
   end
 
   # @return [Scope]

lib/export/dwca/data.rb

@@ -474,7 +474,6 @@ def biological_associations_resource_relationship
     def meta_fields
       return [] if no_records?
       h = File.open(all_data, &:gets)&.strip&.split("\t")
-      h&.shift
       h || []
     end
 

spec/lib/export/dwca/data_spec.rb

@@ -168,7 +168,7 @@
       end
 
       specify 'generated headers are restricted to data' do
-        expect(csv.headers).to contain_exactly(*(['id'] + headers))
+        expect(csv.headers).to contain_exactly(*headers)
       end
 
       specify '#meta_fields can be returned, and exclude id' do

spec/models/dwc_occurrence_spec.rb

@@ -16,6 +16,10 @@
     expect(DwcOccurrence.target_columns).to include(:occurrenceID)
   end
 
+  specify '.excluded_columns must include id' do
+    expect(DwcOccurrence.excluded_columns).to include(:id)
+  end
+
   specify 'extending predicates' do
     include ActiveJob::TestHelper