Class: Waistband::Model

Inherits:
Object
  • Object
show all
Defined in:
lib/waistband/model.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(attributes = {}) ⇒ Model

Returns a new instance of Model.



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# File 'lib/waistband/model.rb', line 129

def initialize(attributes = {})
  @attributes = (attributes || {}).symbolize_keys

  @attributes.each do |key, val|
    if self.class.stringify_columns.include?(key)
      self.send("#{key}=", val)
    elsif !self.class.column_names.include?(key)
      raise ArgumentError.new("#{key} is not a valid column name!")
    end  
  end

  self.class.default_values.each do |k, v|
    self.send("#{k}=", v) if self.send(k).nil?
  end

  @errors = ::Waistband::QuickError.new
end

Instance Attribute Details

#errors ⇒ Object (readonly)

/class << self



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# File 'lib/waistband/model.rb', line 127

def errors
  @errors
end

Class Method Details

.columns(*cols) ⇒ Object 



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# File 'lib/waistband/model.rb', line 91

def columns(*cols)
  cols               |= [:id, :model_type, :created_at, :updated_at]
  self.column_names ||= []
  self.column_names  |= cols.map(&:to_sym)

  cols.each do |col|
    # Normal attributes setters and getters
    class_eval <<-EV, __FILE__, __LINE__ + 1
      def #{col}
        read_attribute(:#{col})
      end

      def #{col}=(val)
        write_attribute(:#{col}, val)
      end
    EV

    # Relationship type columns: `user_id`, `app_id` to `user`, `app`
    if col =~ /(.*)_id$/
      class_eval <<-EV, __FILE__, __LINE__ + 1
        def #{$1}
          klass = "#{$1}".classify.constantize
          klass.find(#{col})
        end

        def #{$1}=(val)
          write_attribute(:#{$1}_id, val.id)
        end
      EV
    end

  end
end

.create(attributes) ⇒ Object 



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# File 'lib/waistband/model.rb', line 25

def create(attributes)
  instance = new(attributes)
  instance.save
  instance
end

.create_index! ⇒ Object 



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# File 'lib/waistband/model.rb', line 65

def create_index!
  Waistband::Index.new(index_name).create!
end

.defaults(values = {}) ⇒ Object 



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# File 'lib/waistband/model.rb', line 78

def defaults(values = {})
  self.default_values ||= {}

  values.each do |k, v|
    self.default_values = self.default_values.merge({k.to_sym => v})
  end
end

.destroy_index! ⇒ Object 



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# File 'lib/waistband/model.rb', line 69

def destroy_index!
  Waistband::Index.new(index_name).destroy!
end

.find(id) ⇒ Object

Raises:

  • (ActiveRecord::RecordNotFound) 


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# File 'lib/waistband/model.rb', line 19

def find(id)
  attrs = index.read(id)
  raise ActiveRecord::RecordNotFound.new("#{self} not found!") unless attrs
  new attrs
end

.first ⇒ Object 



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# File 'lib/waistband/model.rb', line 49

def first
  attrs = query_asc.results.first.try(:source)
  return new(attrs) if attrs
  nil
end

.index ⇒ Object 



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# File 'lib/waistband/model.rb', line 15

def index
  @index ||= Waistband::Index.new(index_name)
end

.last ⇒ Object 



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# File 'lib/waistband/model.rb', line 55

def last
  attrs = query_desc.results.first.try(:source)
  return new(attrs) if attrs
  nil
end

.query ⇒ Object 



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# File 'lib/waistband/model.rb', line 31

def query
  q = index.query('')
  q.add_term('model_type', name.underscore)
  q
end

.query_asc ⇒ Object 



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# File 'lib/waistband/model.rb', line 43

def query_asc
  q = query
  q.add_sort 'created_at', 'asc'
  q
end

.query_desc ⇒ Object 



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# File 'lib/waistband/model.rb', line 37

def query_desc
  q = query
  q.add_sort 'created_at', 'desc'
  q
end

.stringify(*cols) ⇒ Object 



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# File 'lib/waistband/model.rb', line 86

def stringify(*cols)
  self.stringify_columns ||= []
  self.stringify_columns |= cols.map(&:to_sym)
end

.validates(*cols) ⇒ Object 



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# File 'lib/waistband/model.rb', line 73

def validates(*cols)
  self.validate_columns ||= []
  self.validate_columns |= cols.map(&:to_sym)
end

.with_index(name) ⇒ Object 



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# File 'lib/waistband/model.rb', line 61

def with_index(name)
  self.index_name = name.to_s
end

Instance Method Details

#after_save ⇒ Object 



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# File 'lib/waistband/model.rb', line 178

def after_save
end

#attributes ⇒ Object 



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# File 'lib/waistband/model.rb', line 189

def attributes
  Hash[self.class.column_names.map{|col| [col, self.send(col)] }]
end

#before_save ⇒ Object 



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# File 'lib/waistband/model.rb', line 175

def before_save
end

#read_attribute(attribute) ⇒ Object 



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# File 'lib/waistband/model.rb', line 193

def read_attribute(attribute)
  @attributes[attribute]
end

#save ⇒ Object 



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# File 'lib/waistband/model.rb', line 147

def save
  return false unless valid?

  before_save

  prev_id         = self.id
  prev_created_at = self.created_at
  prev_updated_at = self.updated_at

  self.id         ||= generated_id
  self.created_at ||= (Time.zone || Time).now.to_i
  self.updated_at   = (Time.zone || Time).now.to_i
  self.model_type   = self.class.name.downcase

  stored_json = JSON.parse store!
  stored      = !!stored_json.try(:[], 'ok')

  if stored
    after_save
  else stored
    self.id         = prev_id
    self.created_at = prev_created_at
    self.updated_at = prev_updated_at
  end

  stored
end

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/waistband/model.rb', line 181

def valid?
  self.class.validate_columns.each do |col|
    @errors << "#{col} cannot be nil" if self.send(col).nil?
  end

  @errors.empty?
end

#write_attribute(attribute, val) ⇒ Object 



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# File 'lib/waistband/model.rb', line 197

def write_attribute(attribute, val)
  val = val.to_s if self.class.stringify_columns.include?(attribute.to_sym)
  @attributes[attribute] = val
end