Class: AzaharaSchema::Attribute

Inherits:
Object
  • Object
show all
Defined in:
lib/azahara_schema/attribute.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(model, name, type) ⇒ Attribute

Returns a new instance of Attribute.



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# File 'lib/azahara_schema/attribute.rb', line 7

def initialize(model, name, type)
  @name, @model = name, model
  @format = AzaharaSchema::FieldFormat.find(type)
end

Instance Attribute Details

#format ⇒ Object

Returns the value of attribute format.



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# File 'lib/azahara_schema/attribute.rb', line 5

def format
  @format
end

#model ⇒ Object

Returns the value of attribute model.



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# File 'lib/azahara_schema/attribute.rb', line 5

def model
  @model
end

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/azahara_schema/attribute.rb', line 5

def name
  @name
end

#table_alias ⇒ Object

Returns the value of attribute table_alias.



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# File 'lib/azahara_schema/attribute.rb', line 5

def table_alias
  @table_alias
end

Instance Method Details

#add_join(scope) ⇒ Object 



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# File 'lib/azahara_schema/attribute.rb', line 111

def add_join(scope)
  scope
end

#add_preload(scope) ⇒ Object 



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# File 'lib/azahara_schema/attribute.rb', line 115

def add_preload(scope)
  scope
end

#add_sort(scope, order) ⇒ Object 



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# File 'lib/azahara_schema/attribute.rb', line 124

def add_sort(scope, order)
  scope.order( arel_sort_field.public_send(order) )
end

#add_statement(scope, operator, values) ⇒ Object 



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# File 'lib/azahara_schema/attribute.rb', line 119

def add_statement(scope, operator, values)
  values = [values] unless values.is_a?(Array)
  scope.where(arel_statement(operator, values))
end

#aggregable? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/azahara_schema/attribute.rb', line 63

def aggregable?
  format.aggregable?
end

#arel_field(t_alias = self.table_alias) ⇒ Object 



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# File 'lib/azahara_schema/attribute.rb', line 33

def arel_field(t_alias=self.table_alias)
  arel_table(t_alias)[filter_name]
end

#arel_join(parent = nil, join_type = ::Arel::Nodes::OuterJoin, a_tbl = self.arel_table(self.table_alias)) ⇒ Object 



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# File 'lib/azahara_schema/attribute.rb', line 140

def arel_join(parent=nil, join_type=::Arel::Nodes::OuterJoin, a_tbl=self.arel_table(self.table_alias))
  parent
end

#arel_sort_field ⇒ Object 



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# File 'lib/azahara_schema/attribute.rb', line 37

def arel_sort_field
  arel_field
end

#arel_statement(operator, values) ⇒ Object

values has to be array!



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# File 'lib/azahara_schema/attribute.rb', line 76

def arel_statement(operator, values)
  values = values.collect{|v| format.sanitize_value(v) }
  case operator
  when '='
    condition = arel_field.in(values.compact) unless values.compact.empty?
    if values.include?(nil)
      c_nil = arel_field.eq(nil)
      condition = condition ? condition.or(c_nil) : c_nil
    end
    condition
  when '~'
    vals = values.collect{|v| v.split }.flatten
    arl = arel_field.matches("%#{vals[0]}%")
    vals[1..-1].each{|v| arl = arl.or( arel_field.matches("%#{v}%") ) }
    arl
  when '>='
    if values.any? { /\d{4}-\d{2}-\d{2}/ =~ _1 }
      arel_field.lteq(values.map { Date.parse(_1) }.min)
    else
      arel_field.lteq(values.map(&:to_f).min)
    end
  when '<='
    if values.any? { /\d{4}-\d{2}-\d{2}/ =~ _1 }
      arel_field.lteq(values.map { Date.parse(_1) }.max)
    else
      arel_field.lteq(values.map(&:to_f).max)
    end
  when '@>'
    require 'arel/azahara_postgres_exts'
    arel_field.contains(values)
  else
    throw 'Unknown operator ' + operator.to_s
  end
end

#arel_table(t_alias = self.table_alias) ⇒ Object 



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# File 'lib/azahara_schema/attribute.rb', line 29

def arel_table(t_alias=self.table_alias)
  t_alias ? model.arel_table.alias(t_alias) : model.arel_table
end

#association_hash ⇒ Object 



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# File 'lib/azahara_schema/attribute.rb', line 136

def association_hash
  {}
end

#attribute_name ⇒ Object 



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# File 'lib/azahara_schema/attribute.rb', line 132

def attribute_name
  AzaharaSchema::AttributeName.new(self)
end

#available_operators ⇒ Object 



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# File 'lib/azahara_schema/attribute.rb', line 12

def available_operators
  format.available_operators
end

#available_values ⇒ Object 



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# File 'lib/azahara_schema/attribute.rb', line 16

def available_values
  case type
  when 'list'
    @model.try(name.to_s.pluralize)
  else
    nil
  end
end

#build_json_options!(options) ⇒ Object 



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# File 'lib/azahara_schema/attribute.rb', line 128

def build_json_options!(options)
  options
end

#column? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/azahara_schema/attribute.rb', line 55

def column?
  true
end

#filter? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/azahara_schema/attribute.rb', line 59

def filter?
  true
end

#filter_name ⇒ Object 



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# File 'lib/azahara_schema/attribute.rb', line 41

def filter_name
  name
end

#path ⇒ Object

Path in json structure



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# File 'lib/azahara_schema/attribute.rb', line 46

def path
  name
end

#primary_key_name ⇒ Object

Name of the primary key attribute (same as column obviously)



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# File 'lib/azahara_schema/attribute.rb', line 51

def primary_key_name
  model.primary_key
end

#searchable? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/azahara_schema/attribute.rb', line 67

def searchable?
  format.searchable?
end

#type ⇒ Object 



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# File 'lib/azahara_schema/attribute.rb', line 25

def type
  format.format_name
end

#value(record) ⇒ Object 



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# File 'lib/azahara_schema/attribute.rb', line 71

def value(record)
  record.public_send(name)
end