class ObjectPatch::Operations::Replace
A representation of a JSON pointer replace 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
replace with the provided data.
@option patch_data [String] value The value that should be written over
whatever is at the provided path.
@return [void]
# File lib/object_patch/operations/replace.rb, line 38 def initialize(patch_data) @path = patch_data.fetch('path') @value = patch_data.fetch('value') 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/replace.rb, line 14 def apply(target_doc) return @value if processed_path.empty? key = processed_path.last inner_obj = ObjectPatch::Pointer.eval(processed_path[0...-1], target_doc) if inner_obj.is_a?(Array) raise ObjectPatch::InvalidIndexError unless key =~ /\A\d+\Z/ inner_obj[key.to_i] = @value else inner_obj[key] = @value end target_doc end
Returns the path after being expanded by the JSON pointer semantics.
@return [Array<String>] Expanded pointer path
# File lib/object_patch/operations/replace.rb, line 46 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 replace operation
# File lib/object_patch/operations/replace.rb, line 54 def to_patch { 'op' => 'replace', 'path' => @path, 'value' => @value } end