The default value will now output with the correct color

README.md

@@ -1,5 +1,5 @@
 # TableInspector
-![Test coverage](https://img.shields.io/badge/Test_coverage-99.65%25-green)
+![Test coverage](https://img.shields.io/badge/Test_coverage-96.71%25-green)
 ![Release version](https://img.shields.io/badge/Release-v0.6.0-green)
 ![Workflow badge](https://github.com/otorain/table_inspector/actions/workflows/run_test.yml/badge.svg)
 

lib/table_inspector.rb

@@ -7,6 +7,9 @@
 require "table_inspector/indexes"
 require "table_inspector/column"
 require "table_inspector/presenter"
+require "table_inspector/presenter/sqlite3"
+require "table_inspector/presenter/postgresql"
+require "table_inspector/presenter/mysql2"
 require "table_inspector/model_validator"
 require "table_inspector/column_validator"
 require "table_inspector/presenter_option"

lib/table_inspector/column.rb

@@ -7,7 +7,7 @@ class Column
     def initialize(klass, column_name, presenter_option)
       @column = klass.columns.find { |column| column.name == column_name.to_s }
       @klass = klass
-      @presenter = Presenter.new(klass, presenter_option)
+      @presenter = Presenter.current.new(klass, presenter_option)
     end
 
     def render

lib/table_inspector/presenter.rb

@@ -21,31 +21,44 @@ def headings
       ordered_keys.map(&:humanize)
     end
 
+    def self.current
+      adapter = ApplicationRecord.connection_db_config.adapter.camelize
+      available_presenter = %w[Mysql2 Postgresql Sqlite3]
+
+      if available_presenter.include?(adapter)
+        "TableInspector::Presenter::#{adapter}".constantize
+      else
+        TableInspector::Presenter
+      end
+    end
+
     private
 
+    def extract_meta_without_highlight(column)
+      column.as_json.merge(column.sql_type_metadata.as_json).slice(*ordered_keys).tap do |column_data|
+        column_data["default"] = if column_data["type"] == "string"
+                                   column_data["default"]&.inspect
+                                 else
+                                   column_data["default"]
+                                 end
+      end
+    end
+
     def extract_meta_with_highlight(column)
       column_data = extract_meta_without_highlight(column)
 
-      # Colorize text but except "comment" field
-      column_data.each do |k, v|
-        if k != "comment"
-          column_data[k] = colorize(v)
+      # Colorize text except comment
+      column_data.except("comment").each do |k, v|
+        if k == "default"
+          column_data[k] = colorize(v, column.type)
         else
-          column_data[k]
+          column_data[k] = colorize(v)
         end
       end
 
       column_data.slice(*ordered_keys)
     end
 
-    def extract_meta_without_highlight(column)
-      column.as_json.merge(column.sql_type_metadata.as_json).slice(*ordered_keys).tap do |column_data|
-        if column_data["default"] == ""
-          column_data["default"] = column_data["default"].inspect
-        end
-      end
-    end
-
     def ordered_keys
       if option.comment_only
         %w[name comment]
@@ -56,7 +69,30 @@ def ordered_keys
       end
     end
 
-    def colorize(value)
+    def colorize(value, type = nil)
+      if type
+        colorize_by_type(value, type)
+      else
+        colorize_by_value(value)
+      end
+    end
+
+    def colorize_by_type(value, type)
+      case type
+      when :datetime
+        green(value)
+      when :boolean
+        value ? green(value) : red(value)
+      when :integer, :decimal
+        blue(value)
+      when :string, :json, :jsonb
+        yellow(value)
+      else
+        value
+      end
+    end
+
+    def colorize_by_value(value)
       case value
       when TrueClass, DateTime, 'datetime'
         green(value)

lib/table_inspector/presenter/mysql2.rb

@@ -0,0 +1,14 @@
+class TableInspector::Presenter::Mysql2 < TableInspector::Presenter
+  def extract_meta_without_highlight(column)
+    column.as_json.merge(column.sql_type_metadata.as_json).slice(*ordered_keys).tap do |column_data|
+      column_data["default"] = case column_data["type"]
+                               when "string"
+                                 column_data["default"]&.inspect
+                               when "boolean"
+                                 { "1" => true, "0" => false }[column_data["default"]]
+                               else
+                                 column_data["default"]
+                               end
+    end
+  end
+end

lib/table_inspector/presenter/postgresql.rb

@@ -0,0 +1,15 @@
+
+class TableInspector::Presenter::Postgresql < TableInspector::Presenter
+  def extract_meta_without_highlight(column)
+    column.as_json.merge(column.sql_type_metadata.as_json).slice(*ordered_keys).tap do |column_data|
+      column_data["default"] = case column_data["type"]
+                               when "string"
+                                 column_data["default"]&.inspect
+                               when "boolean"
+                                 { "true" => true, "false" => false }[column_data["default"]]
+                               else
+                                 column_data["default"]
+                               end
+    end
+  end
+end

lib/table_inspector/presenter/sqlite3.rb

@@ -0,0 +1,15 @@
+class TableInspector::Presenter::Sqlite3 < TableInspector::Presenter
+
+  def extract_meta_without_highlight(column)
+    column.as_json.merge(column.sql_type_metadata.as_json).slice(*ordered_keys).tap do |column_data|
+      column_data["default"] = case column_data["type"]
+                               when "string"
+                                 column_data["default"]&.inspect
+                               when "boolean"
+                                 { "1" => true, "0" => false }[column_data["default"]]
+                               else
+                                 column_data["default"]
+                               end
+    end
+  end
+end

lib/table_inspector/table.rb

@@ -6,7 +6,7 @@ class Table
 
     def initialize(klass, presenter_option)
       @klass = klass
-      @presenter = Presenter.new(klass, presenter_option)
+      @presenter = Presenter.current.new(klass, presenter_option)
       @presenter_option = presenter_option
     end