Adds auto_increment_id_pkey

README.md

@@ -77,6 +77,7 @@ types. An example collection map might be:
         :meta:
           :table: blog_posts
           :timestamps: true
+          # :auto_increment_id_pkey: true
           :extra_props: true
           :filter:
             category: travel
@@ -120,6 +121,9 @@ collection will be mapped to.
 
 `:timestamps` adds the current timestamps to inserted data.
 
+`:auto_increment_id_pkey:` add an auto increment id public key but COMPROMISES
+uniqueness of data.
+
 `:extra_props` determines the handling of
 unknown fields in MongoDB objects -- more about that later.
 

lib/mosql/schema.rb

@@ -107,7 +107,12 @@ def create_schema(db, drop_table=false)
               end
             end
 
-            primary_key keys
+            if meta[:auto_increment_id_pkey]
+              primary_key :id
+            else
+              primary_key keys
+            end
+
             if meta[:timestamps]
               column 'created_at', 'TIMESTAMP'
               column 'updated_at', 'TIMESTAMP'
@@ -374,7 +379,12 @@ def primary_sql_key_for_ns(ns)
       if ns[:meta][:composite_key]
         keys = ns[:meta][:composite_key]
       else
-        keys << ns[:columns].find {|c| c[:source] == '_id'}[:name]
+        key_fetcher = ns[:columns].find {|c| c[:source] == '_id'}
+        if key_fetcher
+          keys << key_fetcher[:name]
+        else
+          keys = [:id]
+        end
       end
 
       return keys

lib/mosql/streamer.rb

@@ -164,6 +164,8 @@ def import_collection(ns, collection, filter)
         end
       end
 
+      log.info("[#{collection.name} (#{filter}) DONE] Imported #{total_count} rows")
+
       unless batch.empty?
         bulk_upsert(table, ns, batch)
       end