Can we please get a "raw" loader?
还没有人认领这个 Issue。
评估
调研方向
从 YAML.load、safe_load 和建议的入口点 Psych.set_parse_mode 开始，然后比较 issue 中的两个 YAML 示例。定义 raw mode 的转换规则，以及它应如何区别于 native-object mode；完成意味着已明确指定所请求的 hash-tree 输出，并由实现测试覆盖。
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描述
There are times when we need to load a YAML file but for various reasons, we do not want or care about the serialization/native dataclass conversions. We want to load the data in as a hash-tree object, as if the object classifier were not there.
Now it seems to me based on the long discussion related to the safe_load method, that safe_load does not, in fact, do what is requested here. It seems to me that several sane voices were a bit shuoted down in that discussion. But whatever.
What is needed is essentially to load YAML files as if they were dumb JSON files. As if the following code were implemented before the #load
yamltext = File.read("somefile","r")
yamltext.sub!(/^--- \!.*$/,'---')
purehash = YAML.load(yamltext)
Given the following YAML:
--- !ruby/object:Some::Custom::Type::User::Has::No::Gem::For
node: "string"
array:
- "string"
- unquoted text
- "12.5"
- 12.5
- subarray:
option: true
nottrue: "false"
We get back from #load:
{"node"=>"string", "array"=>["string", "unquoted text", "12.5", 12.5, {"subarray"=>{"option"=>true, "nottrue"=>"false"}}]}
I propose an implementation that is cleaner, that uses YAML.load() but based on the parser-personality. The personalities might be a kind of a "raw" mode and "native-object" mode. Raw mode only sees Hash, Array, String. Native-object mode also sees numeric, boolean (and..?)
Psych.set_parse_mode(:native_object_conversion)
purehash=YAML.load(yamltext)
Produces the inspected output, above. Whereas:
Psych.set_parse_mode(:no_object_conversion)
purehash=YAML.load(yamltext)
produces (subtly different):
{"node"=>"string", "array"=>["string", "unquoted text", "12.5", "12.5", {"subarray"=>{"option"=>"true", "nottrue"=>"false"}}]}
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