use elastic search long/lat

[todo]

growstuff/app/controllers/plantings_controller.rb

Lines 41 to 46 in 6c9a15f

	# TODO: use elastic search long/lat
	@neighbours = @planting.nearby_same_crop
	.where.not(id: @planting.id)
	.includes(:owner, :crop, :garden)
	.limit(6)
	respond_with @planting

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This issue was generated by todo based on a TODO comment in 6c9a15f when #2320 was merged. cc @Br3nda.

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