sanderhouttekier/sequelizedemo

• mkdir sqldemo
• cd sqldemo
• npm install express express-generator
• node_modules/.bin/express . -f
• npm install

• npm install --save sequelize sequelize-cli sqlite3
• sequelize init

will generate models dir, config dir, and migrations dir

• edit config/config.json

"development": {
  "dialect": "sqlite",
  "storage": "./sqldemo-dev.sqlite"
},

sequelize model:create --name User --attributes "username:string"
sequelize model:create --name Task --attributes "title:string, completed:boolean"

mention how migrations are automatically added when creating new models via this CLI and how limited that is. Manual adding of migrations is needed for every change until something can generate em for us.

first all entities are created, then assosiations are added

available:

• hasOne
• belongsTo
• hasMany
• belongsToMany

back to our example

User.hasMany(models.Task);
Task.belongsTo(models.User);

a hasMany:

• adds User.tasks if you include the model in your query (population)
• adds User.getTasks(), User.setTasks() on the model
• adds User.removeTask(), User.removeTasks() on the model
• adds User.addTask(), User.addTasks() on the model

while, a belongsTo:

• adds Task.user if you include the user model in your query (population)
• adds Task.setUser(), Task.getUser() on the model.

User
  .create({ username: 'fnord' })
  .then(function() {

  });

User
    .find(1)
    .then(function(user){
        // do stuff;
    });
// is same as
User
    .find({ where: { id: 1 } })
    .then(function(user){
        // do stuff
    });

// finding more than 1
Task
    .findAll({ where: { completed: false } })
    .then(function(tasks){
        // do stuff with the array of tasks
    });

var newUser = { username: 'myNewUser' };
User
    .findOrCreate({
        where: { username: newUser.username },
        defaults: newUser;
    })
    .spread(function(m, created){
        // do stuff
    });

http://sequelize.readthedocs.org/en/latest/docs/models/#data-retrieval-finders

• validation
• bulk create
• expanding model with methods .getFullName
• expanding model with custom setters and getters
• finding with counts or other ma(d)(th) science
• errorhandling .catch()
• .spread() vs .then()
• eager loading
• ...