Class: OccamsRecord::EagerLoaders::AdHocBase

Inherits:
Object
  • Object
show all
Defined in:
lib/occams-record/eager_loaders/ad_hoc_base.rb

Overview

Base class for eager loading ad hoc associations.

Direct Known Subclasses

AdHocMany, AdHocOne

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, mapping, sql, binds: {}, model: nil, use: nil) { ... } ⇒ AdHocBase

Initialize a new add hoc association.

Yields:

Raises:

  • (ArgumentError) 


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# File 'lib/occams-record/eager_loaders/ad_hoc_base.rb', line 21

def initialize(name, mapping, sql, binds: {}, model: nil, use: nil, &eval_block)
  @name = name.to_s
  @sql, @binds, @use, @model, @eval_block = sql, binds, use, model, eval_block
  raise ArgumentError, "Add-hoc eager loading mapping must contain exactly one key-value pair" unless mapping.size == 1
  @local_key = mapping.keys.first
  @foreign_key = mapping.fetch(@local_key)
end

Instance Attribute Details

#name ⇒ String (readonly) 



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# File 'lib/occams-record/eager_loaders/ad_hoc_base.rb', line 8

def name
  @name
end

Instance Method Details

#run(rows, query_logger: nil) ⇒ Object

Run the query and merge the results into the given rows.



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# File 'lib/occams-record/eager_loaders/ad_hoc_base.rb', line 35

def run(rows, query_logger: nil)
  calc_ids(rows) { |ids|
    binds = @binds.merge({:ids => ids})
    assoc_rows = RawQuery.new(@sql, binds, use: @use, query_logger: query_logger, &@eval_block).model(@model).run
    merge! assoc_rows, rows
  }
end