Class: DataShift::MethodBinding

Inherits:
Object
  • Object
show all
Includes:
Logging
Defined in:
lib/datashift/inbound_data/method_binding.rb

Direct Known Subclasses

NoMethodBinding

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Logging

#logdir, #logdir=, #logger, #verbose

Constructor Details

#initialize(name, idx, model_method) ⇒ MethodBinding

Store the raw (client supplied) name against the active record klass(model). Operator is the associated method call on klass, i.e client supplies name 'Price' in a spreadsheet, but true operator to call on klass is price

type determines the style of operator call; simple assignment, an association or a method call

col_types can typically be derived from klass.columns - set of ActiveRecord::ConnectionAdapters::Column



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# File 'lib/datashift/inbound_data/method_binding.rb', line 38

def initialize(name, idx, model_method)
  @inbound_column = InboundData::Column.new(name, idx)

  @model_method = model_method

  @valid = (name && model_method) ? true : false
end

Instance Attribute Details

#inbound_column ⇒ Object (readonly)

Returns the value of attribute inbound_column.



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# File 'lib/datashift/inbound_data/method_binding.rb', line 22

def inbound_column
  @inbound_column
end

#model_method ⇒ Object (readonly)

Returns the value of attribute model_method.



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# File 'lib/datashift/inbound_data/method_binding.rb', line 20

def model_method
  @model_method
end

#valid ⇒ Object

Is this method detail a valid mapping, aids identifying unmapped/unmappable columns



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# File 'lib/datashift/inbound_data/method_binding.rb', line 27

def valid
  @valid
end

Instance Method Details

#add_column_data(data) ⇒ Object 



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# File 'lib/datashift/inbound_data/method_binding.rb', line 71

def add_column_data(data)
  inbound_column.data << data
end

#add_lookup(model_method, field, value) ⇒ Object

Example : Project:name:My Best Project User (klass) has_one project lookup where name(field) == 'My Best Project' (value) User.project.where( :name => 'My Best Project')



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# File 'lib/datashift/inbound_data/method_binding.rb', line 80

def add_lookup( model_method, field, value)

  # check the finder method name is a valid field on the actual association class
  klass = model_method.klass

  association = klass.reflect_on_association(model_method.operator)

  # TODO: - this is instance methods .. what about class methods ?
  if association && association.klass.new.respond_to?(field)
    inbound_column.add_lookup(association.klass, field, value)
    logger.info("Complex Lookup specified for [#{model_method.operator}] : on field [#{field}] (optional value [#{value}])")
  else
    logger.error("Check MethodBinding [#{inbound_name}](#{inbound_index}) - Association field names are case sensitive")
    raise NoSuchOperator.new("Field [#{field}] Not Found on Association [#{model_method.operator}] within Class #{klass.name}")
  end
end

#class_name ⇒ Object 



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# File 'lib/datashift/inbound_data/method_binding.rb', line 59

def class_name
  model_method.klass.name
end

#inbound_index ⇒ Object 



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# File 'lib/datashift/inbound_data/method_binding.rb', line 67

def inbound_index
  inbound_column.index
end

#inbound_name ⇒ Object 



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# File 'lib/datashift/inbound_data/method_binding.rb', line 63

def inbound_name
  inbound_column.source
end

#invalid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/datashift/inbound_data/method_binding.rb', line 101

def invalid?
  !valid?
end

#klass ⇒ Object 



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# File 'lib/datashift/inbound_data/method_binding.rb', line 55

def klass
  model_method.klass
end

#operator ⇒ Object

TODO: - use delegators



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# File 'lib/datashift/inbound_data/method_binding.rb', line 47

def operator
  model_method ? model_method.operator : ''
end

#operator?(name, case_sensitive = false) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/datashift/inbound_data/method_binding.rb', line 51

def operator?(name, case_sensitive = false)
  model_method ? model_method.operator?(name, case_sensitive) : false
end

#pp ⇒ Object 



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# File 'lib/datashift/inbound_data/method_binding.rb', line 105

def pp
  "Binding: Column [#{inbound_index}] : Header [#{inbound_name}] : Operator [#{model_method.operator}]"
end

#spp ⇒ Object 



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# File 'lib/datashift/inbound_data/method_binding.rb', line 109

def spp
  "Column [#{inbound_index}] : Header [#{inbound_name}]"
end

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/datashift/inbound_data/method_binding.rb', line 97

def valid?
  (@valid == true)
end