class ObjectPatch::Operations::Copy
A representation of a JSON pointer copy operation.
Public Class Methods
Setup the replace operation with any required arguments.
@param [Hash] patch_data Parameters necessary to build the operation. @option patch_data [String] path The location in the target document to
duplicate the data to.
@option patch_data [String] from The source data that will be copied into
the new location.
@return [void]
# File lib/object_patch/operations/copy.rb, line 41 def initialize(patch_data) @from = patch_data.fetch('from') @path = patch_data.fetch('path') end
Public Instance Methods
Apply this operation to the provided document and return the updated document. Please note that the changes will be reflected not only in the returned value but the original document that was passed in as well.
@param [Object] target_doc The document that will be modified by this
patch.
@return [Object] The modified document
# File lib/object_patch/operations/copy.rb, line 14 def apply(target_doc) src_key = processed_from.last dst_key = processed_path.last src_obj = ObjectPatch::Pointer.eval(processed_from[0...-1], target_doc) dst_obj = ObjectPatch::Pointer.eval(processed_path[0...-1], target_doc) if src_obj.is_a?(Array) raise ObjectPatch::InvalidIndexError unless src_key =~ /\A\d+\Z/ copied_obj = src_obj.fetch(src_key.to_i) else copied_obj = src_obj.fetch(src_key) end ObjectPatch::Operations.add_op(dst_obj, dst_key, copied_obj) target_doc end
Returns the from field after being expanded by the JSON pointer semantics.
@return [Array<String>] Expanded pointer path
# File lib/object_patch/operations/copy.rb, line 49 def processed_from ObjectPatch::Pointer.parse(@from) end
Returns the path after being expanded by the JSON pointer semantics.
@return [Array<String>] Expanded pointer path
# File lib/object_patch/operations/copy.rb, line 56 def processed_path ObjectPatch::Pointer.parse(@path) end
Covert this operation to a format that can be built into a full on JSON patch.
@return [Hash<String => String>] JSON patch copy operation
# File lib/object_patch/operations/copy.rb, line 64 def to_patch { 'op' => 'copy', 'from' => @from, 'path' => @path } end