jaguar_query_postgresql 0.1.2

  • Readme
  • Changelog
  • Installing
  • 12

jaguar_query_postgresql #

postgresql adapter for jaguar_orm

Usage #

A simple usage example:

import 'dart:async';
import 'package:jaguar_orm_postgresql/jaguar_orm_postgresql.dart';

// The model
class Post {
  Post();

  Post.make(this.id, this.msg, this.author);

  int id;

  String msg;

  String author;

  String toString() => '$id $msg $author';
}

/// The adapter
PgAdapter _adapter =
    new PgAdapter('postgres://postgres:dart_jaguar@localhost/postgres');

/// The bean
class PostBean {
  /// Field DSL for id column
  final IntField id = new IntField('_id');

  /// Field DSL for msg column
  final StrField msg = new StrField('msg');

  /// Field DSL for author column
  final StrField author = new StrField('author');

  /// Table name for the model this bean manages
  String get tableName => 'posts';

  /// Inserts a new post into table
  Future insert(Post post) async {
    InsertStatement inserter = new InsertStatement()..into(tableName);

    inserter.set(id.set(post.id));
    inserter.set(msg.set(post.msg));
    inserter.set(author.set(post.author));

    await _adapter.insert(inserter);
  }

  /// Updates a post
  Future update(int id, String author) async {
    UpdateStatement updater = new UpdateStatement()..into(tableName);
    updater.where(this.id.eq(id));

    updater.set(this.author.set(author));

    await _adapter.update(updater);
  }

  /// Finds one post by [id]
  Future<Post> findOne(int id) async {
    FindStatement updater = new FindStatement()..from(tableName);

    updater.where(this.id.eq(id));

    Map map = await _adapter.findOne(updater);

    Post post = new Post();
    post.id = map['_id'];
    post.msg = map['msg'];
    post.author = map['author'];

    return post;
  }

  /// Finds all posts
  Future<List<Post>> findAll() async {
    FindStatement finder = new FindStatement()..from(tableName);

    List<Map> maps = await (await _adapter.find(finder)).toList();

    List<Post> posts = new List<Post>();

    for(Map map in maps) {
      Post post = new Post();

      post.id = map['_id'];
      post.msg = map['msg'];
      post.author = map['author'];

      posts.add(post);
    }

    return posts;
  }

  /// Deletes a post by [id]
  Future delete(int id) async {
    DeleteStatement deleter = new DeleteStatement()..from(tableName);

    deleter.where(this.id.eq(id));

    await _adapter.delete(deleter);
  }

  /// Deletes all posts
  Future deleteAll() async {
    DeleteStatement deleter = new DeleteStatement()..from(tableName);

    await _adapter.delete(deleter);
  }
}

main() async {
  // Connect
  await _adapter.connect();

  PostBean bean = new PostBean();

  // Delete all
  await bean.deleteAll();

  // Insert some posts
  await bean.insert(new Post.make(1, 'Whatever 1', 'mark'));
  await bean.insert(new Post.make(2, 'Whatever 2', 'bob'));

  // Find one post
  Post post = await bean.findOne(1);
  print(post);

  // Find all posts
  List<Post> posts = await bean.findAll();
  print(posts);

  // Update a post
  await bean.update(1, 'rowling');

  // Check that the post is updated
  post = await bean.findOne(1);
  print(post);

  // Delete some posts
  await bean.delete(1);
  await bean.delete(2);

  // Find a post when none exists
  try {
    post = await bean.findOne(1);
    print(post);
  } on JaguarOrmException catch(e) {
    print(e);
  }

  // Close connection
  await _adapter.close();
}

Changelog #

0.0.1 #

  • Initial version, created by Stagehand

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:


dependencies:
  jaguar_query_postgresql: ^0.1.2

2. Install it

You can install packages from the command line:

with pub:


$ pub get

Alternatively, your editor might support pub get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:


import 'package:jaguar_query_postgresql/jaguar_query_postgresql.dart';
  
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Learn more about scoring.

This package version is not analyzed, because it is more than two years old. Check the latest stable version for its analysis.

The package version is not analyzed, because it does not support Dart 2. Until this is resolved, the package will receive a health and maintenance score of 0.

Analysis issues and suggestions

Support Dart 2 in pubspec.yaml.

The SDK constraint in pubspec.yaml doesn't allow the Dart 2.0.0 release. For information about upgrading it to be Dart 2 compatible, please see https://dart.dev/dart-2#migration.

Dependencies

Package Constraint Resolved Available
Direct dependencies
Dart SDK >=1.8.0 <2.0.0