Class: Netzke::Basepack::DataAdapters::SequelAdapter

Inherits:
AbstractAdapter show all
Defined in:
lib/netzke/basepack/data_adapters/sequel_adapter.rb

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from AbstractAdapter

adapter_class, #first, inherited, #initialize, #new_record

Constructor Details

This class inherits a constructor from Netzke::Basepack::DataAdapters::AbstractAdapter

Class Method Details

.for_class?(model_class) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/netzke/basepack/data_adapters/sequel_adapter.rb', line 3

def self.for_class?(model_class)
  model_class <= Sequel::Model
end

Instance Method Details

#class_for(assoc_name) ⇒ Object

Returns the model class for an association



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# File 'lib/netzke/basepack/data_adapters/sequel_adapter.rb', line 87

def class_for assoc_name
  @model_class.association_reflection(assoc_name.to_sym)[:class_name].constantize
end

#column_virtual?(c) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/netzke/basepack/data_adapters/sequel_adapter.rb', line 31

def column_virtual? c
  assoc, method = c[:name].split '__'
  if method
    !class_for(assoc.to_sym).columns.include? method.to_sym
  else
    !@model_class.columns.include? assoc.to_sym
  end
end

#combobox_options_for_column(column, method_options = {}) ⇒ Object

Returns options for comboboxes in grids/forms



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# File 'lib/netzke/basepack/data_adapters/sequel_adapter.rb', line 41

def combobox_options_for_column(column, method_options = {})
  query = method_options[:query]

  # First, check if we have options for this column defined in persistent storage
  options = column[:combobox_options] && column[:combobox_options].split("\n")
  if options
    query ? options.select{ |o| o.index(/^#{query}/) }.map{ |el| [el] } : options
  else
    assoc_name, assoc_method = column[:name].split '__'

    if assoc_name
      # Options for an asssociation attribute
      dataset = class_for(assoc_name)

      dataset = dataset.extend_with(method_options[:scope]) if method_options[:scope]

      if class_for(assoc_name).column_names.include?(assoc_method)
        # apply query
        dataset = dataset.where(assoc_method.to_sym.like("%#{query}%")) if query.present?
        dataset.all.map{ |r| [r.id, r.send(assoc_method)] }
      else
        dataset.all.map{ |r| [r.id, r.send(assoc_method)] }.select{ |id,value| value =~ /^#{query}/ }
      end
    else
      # Options for a non-association attribute
      res=@model_class.netzke_combo_options_for(column[:name], method_options)

      # ensure it is an array-in-array, as Ext will fail otherwise
      raise RuntimeError, "netzke_combo_options_for should return an Array" unless res.kind_of? Array
      return [[]] if res.empty?

      unless res.first.kind_of? Array
        res=res.map do |v|
          [v]
        end
      end
      return res
    end
  end
end

#count_records(params, columns = []) ⇒ Object 



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# File 'lib/netzke/basepack/data_adapters/sequel_adapter.rb', line 11

def count_records(params, columns=[])
  # dont pass columns, JOINs will be done as necessary for filters
  get_dataset(params, [], true).count
end

#destroy(ids) ⇒ Object 



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# File 'lib/netzke/basepack/data_adapters/sequel_adapter.rb', line 91

def destroy(ids)
  @model_class.where(:id => ids).destroy
end

#destroy_all ⇒ Object

Needed for seed and tests



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# File 'lib/netzke/basepack/data_adapters/sequel_adapter.rb', line 136

def destroy_all
  @model_class.destroy
end

#errors_array(record) ⇒ Object

give the data adapter the opporunity to process error messages must return an raay of the form [“Title can’t be blank”, “Foo can’t be blank”]



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# File 'lib/netzke/basepack/data_adapters/sequel_adapter.rb', line 122

def errors_array(record)
  record.errors.to_a.inject([]) do |errors, error|
    field, message = error
    errors << "#{record.class.human_attribute_name(field)} #{message.join ', '}"
    errors
  end
end

#find_record(id) ⇒ Object 



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# File 'lib/netzke/basepack/data_adapters/sequel_adapter.rb', line 95

def find_record(id)
  @model_class[id]
end

#foreign_key_for(assoc_name) ⇒ Object 



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# File 'lib/netzke/basepack/data_adapters/sequel_adapter.rb', line 82

def foreign_key_for assoc_name
  @model_class.association_reflection(assoc_name.to_sym)[:key].to_s
end

#get_assoc_property_type(assoc_name, prop_name) ⇒ Object 



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# File 'lib/netzke/basepack/data_adapters/sequel_adapter.rb', line 20

def get_assoc_property_type assoc_name, prop_name
  db_schema=class_for(assoc_name.to_sym).db_schema
  # return nil if prop_name not present in db schema (virtual column)
  db_schema[prop_name.to_sym] ? db_schema[prop_name.to_sym][:type] : nil
end

#get_property_type(column) ⇒ Object

like get_assoc_property_type but for non-association columns



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# File 'lib/netzke/basepack/data_adapters/sequel_adapter.rb', line 27

def get_property_type column
  column[:type]
end

#get_records(params, columns = []) ⇒ Object 



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# File 'lib/netzke/basepack/data_adapters/sequel_adapter.rb', line 7

def get_records(params, columns=[])
  get_dataset(params, columns).all
end

#hash_fk_model ⇒ Object

Build a hash of foreign keys and the associated model



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# File 'lib/netzke/basepack/data_adapters/sequel_adapter.rb', line 100

def hash_fk_model
  @model_class.all_association_reflections.inject({}) do |res, assoc|
    res[assoc[:key]] = assoc[:class_name].constantize.model_name.underscore.to_sym
    res
  end
end

#last ⇒ Object

Needed for seed and tests



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# File 'lib/netzke/basepack/data_adapters/sequel_adapter.rb', line 131

def last
  @model_class.last
end

#map_type(type) ⇒ Object 



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# File 'lib/netzke/basepack/data_adapters/sequel_adapter.rb', line 16

def map_type type
  type
end

#move_records(params) ⇒ Object

TODO: is this possible with Sequel?



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# File 'lib/netzke/basepack/data_adapters/sequel_adapter.rb', line 108

def move_records(params)
end

#save_record(record) ⇒ Object

give the data adapter the opportunity the set special options for saving



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# File 'lib/netzke/basepack/data_adapters/sequel_adapter.rb', line 113

def save_record(record)
  # don't raise an error on saving. basepack will evaluate record.errors
  # to get validation errors
  record.raise_on_save_failure = false
  record.save
end