can now parse simple_db

app/controllers/dbs_controller.rb

@@ -2,4 +2,8 @@
 
 # Controller for Database Objects
 class DbsController < ApplicationController
+  def show
+    db = Db.find(params[:id])
+    render json: db
+  end
 end

app/models/db_file.rb

@@ -4,6 +4,7 @@
 class DbFile < ActiveRecord::Base
   belongs_to :db_folder
   has_many :db_streams, dependent: :destroy
+  accepts_nested_attributes_for :db_streams
 
   def remove(db_service:)
     db_service.remove_file(path)

spec/builders/db_builder_spec.rb

@@ -13,8 +13,10 @@ helper = DbSchemaHelper.new
 #  `- file2_2
 
 simple_db = [
-  helper.entry('/folder1/f1_1', metadata: { name: 'file1_1' }),
-  helper.entry('/folder1/f1_2', metadata: { name: 'file1_2' }),
+  helper.entry('/folder1/f1_1',
+               metadata: { name: 'file1_1' }, stream_count: 4),
+  helper.entry('/folder1/f1_2',
+               metadata: { name: 'file1_2' }, stream_count: 5),
   helper.entry('/folder2/f2_1', metadata: { name: 'file2_1' }),
   helper.entry('/folder2/f2_2', metadata: { name: 'file2_2' })
 ]
@@ -24,7 +26,7 @@ describe DbBuilder do
     def update_with_schema(schema)
       @db = Db.new
       @db_builder = DbBuilder.new(db: @db)
-      @db_builder.update_db(schema: schema)
+      @db_builder.update_db(schema: Array.new(schema))
       @root = @db.root_folder
     end
     describe 'given the simple_db schema' do
@@ -38,10 +40,19 @@ describe DbBuilder do
         update_with_schema(simple_db)
         folder1 = @root.subfolders[0]
         expect(folder1.name).to eq('folder1')
-        expect(folder1.db_files.count).to eq(2)
         expect(folder1.db_files[0].name).to eq('file1_1')
         expect(folder1.db_files[1].name).to eq('file1_2')
       end
+      it 'builds files in sub-folder1' do
+        update_with_schema(simple_db)
+        folder1 = @root.subfolders[0]
+        expect(folder1.db_files.count).to eq(2)
+        file1 = folder1.db_files[0]
+        file2 = folder1.db_files[1]
+        expect(file1.db_streams.count).to eq(4)
+        expect(file2.db_streams.count).to eq(5)
+      end
+
       it 'builds sub-folder2' do
         update_with_schema(simple_db)
         folder2 = @root.subfolders[1]

spec/controllers/dbs_controller_spec.rb

@@ -3,4 +3,12 @@
 require 'rails_helper'
 
 RSpec.describe DbsController, type: :controller do
+  describe 'GET show' do
+    it 'lists the database contents' do
+      allow(Db).to receive(:find).and_return(Db.new)
+      get :show, id: 1
+      expect(Db).to have_received(:find)
+      expect(response.header['Content-Type']).to include('application/json')
+    end
+  end
 end

spec/factories/db_schema_helper.rb

@@ -4,11 +4,27 @@
 # are usually returned by DbAdapter.schema
 class DbSchemaHelper
   # schema data
-  def entry(path, type: 'uint8_1', metadata: {})
+  def entry(path, type: 'uint8_1', metadata: {}, stream_count: 0)
+    if stream_count > 0
+      metadata[:db_streams_attributes] = __build_streams(stream_count)
+    end
+
     { path: path, type: type,
       start_time: 0, end_time: 0,
       total_rows: 0, total_time: 0,
-      metadata: metadata
-    }
+      metadata: metadata }
+  end
+
+  # build stream hash for a file
+  def __build_streams(count)
+    return nil unless count > 0
+    streams = []
+    (0..(count - 1)).each do |i|
+      streams <<
+        { 'name': "stream#{i}",
+          'units':  'unit',
+          'column': i }
+    end
+    streams
   end
 end

spec/features/list_db_contents_spec.rb

+# frozen_string_literal: true
+
+require 'rails_helper'
+
+helper = DbSchemaHelper.new
+simple_db = [
+  helper.entry('/folder1/f1_1',
+               metadata: { name: 'file1_1' }, stream_count: 4),
+  helper.entry('/folder1/f1_2',
+               metadata: { name: 'file1_2' }, stream_count: 5),
+  helper.entry('/folder2/f2_1', metadata: { name: 'file2_1' }),
+  helper.entry('/folder2/f2_2', metadata: { name: 'file2_2' })
+]
+
+RSpec.describe 'parse and display a database' do
+  def update_with_schema(schema)
+    @db = Db.new
+    @db_builder = DbBuilder.new(db: @db)
+    @db_builder.update_db(schema: Array.new(schema))
+    @db.save
+  end
+
+  it 'loads and displays a database' do
+    # TODO
+    # update_with_schema(simple_db)
+    # visit db_path(@db)
+  end
+end