Select examples by words

main.rb

@@ -21,14 +21,9 @@ before do
   headers 'Access-Control-Allow-Origin' => '*'
 end
 
-get '/examples' do
+get '/words/:id' do
   $DB_POOL.with do |db_conn|
-    ids =
-      case params[:ids]
-      when Array then params[:ids]
-      when String then params[:ids].split(',')
-      else raise 'Invalid param "ids"'
-      end.map { |id| Integer id }
+    word_id = Integer params[:id]
 
     examples = db_conn.exec_params(
       (
@@ -40,7 +35,18 @@ get '/examples' do
             SELECT example_id, language_id, MIN(index) as min_index
             FROM example_texts
             WHERE
-              example_id = ANY($1)
+              example_id = ANY(
+                SELECT example_texts.example_id
+                FROM words
+                INNER JOIN word_forms
+                ON word_forms.word_id = words.id
+                INNER JOIN word_form_example_texts
+                ON word_form_example_texts.word_form_id = word_forms.id
+                INNER JOIN example_texts
+                ON example_texts.id = word_form_example_texts.example_text_id
+                WHERE words.id = $1
+                GROUP BY example_texts.example_id
+              )
               AND
               (language_id = 5 OR language_id = 2)
             GROUP BY example_id, language_id
@@ -52,9 +58,11 @@ get '/examples' do
           GROUP BY foo.example_id
         SQL
       ),
-      [PG::TextEncoder::Array.new.encode(ids)],
+      [word_id],
     ).map { |row| row['values'] }
 
-    json examples
+    json({
+      examples: examples,
+    })
   end
 end