Exhibition-Workflow

Links

• Exhibition

Workflow

We use the module "Users" as example

• Create a metadata description: lib/meta/users_meta.dart

import 'module_meta_data.dart';

class UserMeta extends ModuleMetaData  {
  static UserMeta instance = UserMeta.internal();
  UserMeta.internal() : super('Users',
    [
      PropertyMetaData('id', DataType.reference, ':primary:', 'combo'),
      PropertyMetaData('name', DataType.string, ':notnull:', '', size: 64),
      PropertyMetaData('displayName', DataType.string, ':unique:notnull:', '', size: 32),
      PropertyMetaData('email', DataType.string, ':unique:notnull:', '', size: 255),
      PropertyMetaData('role', DataType.reference, ':notnull:', ''),
      PropertyMetaData('created', DataType.datetime, '', ''),
      PropertyMetaData('createdBy', DataType.string, '', '', size: 32),
      PropertyMetaData('changed', DataType.datetime, '', ''),
      PropertyMetaData('changedBy', DataType.string, '', '', size: 32),
    ],
    tableName: 'loginusers',
  );
  factory UserMeta(){
    return instance;
  }
}

• Create some source files: (for example: the module "Users")

# precondition: the current directory is the base folder of the dev-app.
mkdir -p lib/meta/users
# The following call works without meta data. It works without recreation of the tool:
meta_tool print-modules Users >lib/meta/modules.dart
# Now we need a new instance of the meta_tool (to realize the meta data changes):
./ReCreateMetaTool
meta_tool print-data Users >lib/page/users/user_data.dart
# show the SQL table definition:
meta_tool print-table