Revisions to Delete multiple hash keys

The slice! method takes keys that are to be kept in the modified hash. In this case, the original author was explaining how slice will help define an approve list instead of a deny list. I changed the argument names to reflect that.

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edit approved Oct 16, 2020 at 0:03

Fralcon

489
6
15

While using Hash#except handles your problem, be aware that it introduces potential security issues. A good rule of thumb for handling any data from visitors is to use a whitelist approach. In this case, using Hash#slice instead.

params.slice!(:param_to_remove_1param_to_keep_1, :param_to_remove_2param_to_keep_2) redirect_to my_path(params)

While using Hash#except handles your problem, be aware that it introduces potential security issues. A good rule of thumb for handling any data from visitors is to use a whitelist approach. In this case, using Hash#slice instead.

params.slice!(:param_to_remove_1, :param_to_remove_2) redirect_to my_path(params)

While using Hash#except handles your problem, be aware that it introduces potential security issues. A good rule of thumb for handling any data from visitors is to use a whitelist approach. In this case, using Hash#slice instead.

params.slice!(:param_to_keep_1, :param_to_keep_2) redirect_to my_path(params)

clarified parameters by improving names and added code block

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edit approved Jan 24, 2017 at 14:55

jsa

1.2k
11
24

While using Hash#exceptHash#except handles your problem, be aware that it introduces potential security issues. A good rule of thumb for handling any data from visitors is to use a whitelist approach. In this case, using Hash#sliceHash#slice instead.

params.slice!(:desired_param_1, :desired_param_2)

redirect_to my_path(params)

params.slice!(:param_to_remove_1, :param_to_remove_2) redirect_to my_path(params)

While using Hash#except handles your problem, be aware that it introduces potential security issues. A good rule of thumb for handling any data from visitors is to use a whitelist approach. In this case, using Hash#slice instead.

params.slice!(:desired_param_1, :desired_param_2)

redirect_to my_path(params)

While using Hash#except handles your problem, be aware that it introduces potential security issues. A good rule of thumb for handling any data from visitors is to use a whitelist approach. In this case, using Hash#slice instead.

params.slice!(:param_to_remove_1, :param_to_remove_2) redirect_to my_path(params)

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answered Oct 14, 2009 at 19:57

user190125

While using Hash#except handles your problem, be aware that it introduces potential security issues. A good rule of thumb for handling any data from visitors is to use a whitelist approach. In this case, using Hash#slice instead.

params.slice!(:desired_param_1, :desired_param_2)

redirect_to my_path(params)

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