Class: InstDataShipper::SchemaBuilder::TableSchemaBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/inst_data_shipper/schema_builder.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(table) ⇒ TableSchemaBuilder 



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# File 'lib/inst_data_shipper/schema_builder.rb', line 64

def initialize(table)
  @options = table
  @columns = table[:columns]
end

Instance Attribute Details

#columns ⇒ Object (readonly)

Returns the value of attribute columns.



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# File 'lib/inst_data_shipper/schema_builder.rb', line 62

def columns
  @columns
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/inst_data_shipper/schema_builder.rb', line 62

def options
  @options
end

Class Method Details

.build(tdef, &block) ⇒ Object 



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# File 'lib/inst_data_shipper/schema_builder.rb', line 69

def self.build(tdef, &block)
  builder = new(tdef)
  builder.instance_exec(&block)
  builder.options
end

Instance Method Details

#annotate(key, value) ⇒ Object 



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# File 'lib/inst_data_shipper/schema_builder.rb', line 75

def annotate(key, value)
  options[key] = value
end

#batch_preprocess(&block) ⇒ Object 



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# File 'lib/inst_data_shipper/schema_builder.rb', line 108

def batch_preprocess(&block)
  options[:batch_preprocess] ||= []
  options[:batch_preprocess] << block
end

#column(name, *args, refs: [], from: nil, **extra, &block) ⇒ Object 



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# File 'lib/inst_data_shipper/schema_builder.rb', line 118

def column(name, *args, refs: [], from: nil, **extra, &block)
  from ||= name.to_s

  cdef = {
    warehouse_name: name.to_s,
    from: from,
    **extra,
  }

  if args[0].is_a?(Symbol)
    cdef[:type] = args.shift()
  end

  if args[0].is_a?(String)
    cdef[:description] = args.shift()
  end

  if args.present?
    raise ArgumentError, "Received unexpected arguments: #{args.inspect}"
  end

  cdef[:references] = Array(refs)

  if options[:model].is_a?(Class) && cdef[:local_name].to_s.ends_with?('_id')
    rel_name = cdef[:local_name].to_s[0...-3]
    refl = options[:model].reflections[rel_name]
    cdef[:references] << "#{refl.klass}##{refl.options[:primary_key] || 'id'}" if refl.present? && !refl.polymorphic?
  end

  compiled_from = compile_transformer(from)

  cdef[:block] = ->(row) {
    value = instance_exec(row, &compiled_from)
    value = instance_exec(value, row, &block) if block.present?
    value
  }

  @columns << cdef

  cdef
end

#incremental(scope = nil, **kwargs) ⇒ Object 



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# File 'lib/inst_data_shipper/schema_builder.rb', line 83

def incremental(scope=nil, **kwargs)
  if (extras = kwargs.keys - i[on if]).present?
    raise ArgumentError, "Unsupported options: #{extras.inspect}"
  end

  options[:incremental] = {
    on: Array(kwargs[:on]),
    scope: scope,
    if: kwargs[:if],
  }
end

#row_preprocess(&block) ⇒ Object 



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# File 'lib/inst_data_shipper/schema_builder.rb', line 113

def row_preprocess(&block)
  options[:row_preprocess] ||= []
  options[:row_preprocess] << block
end

#source(source = nil, override_model = nil, **kwargs, &block) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/inst_data_shipper/schema_builder.rb', line 95

def source(source=nil, override_model=nil, **kwargs, &block)
  raise "Source already set" if options[:sourcer].present?
  raise ArgumentError, "Cannot provide source and block" if source.present? && block.present?

  if source.is_a?(Symbol)
    mthd = :"import_#{source}"
    options = self.options
    source = ->(table_def) { send(mthd, override_model || options[:model] || options[:warehouse_name], schema_name: options[:warehouse_name], **kwargs) }
  end

  self.options[:sourcer] = source
end

#version(version) ⇒ Object 



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# File 'lib/inst_data_shipper/schema_builder.rb', line 79

def version(version)
  options[:version] = version
end