Added valueForKey filter #191
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kylef
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Jan 22, 2018
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Started reviewing, but then thought about #189 (comment), submitting comment review for posterity. But perhaps these two filters can be combined.
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| func valueForKeyFilter(value: Any?, arguments: [Any?], context: Context) throws -> Any? { | ||
| guard arguments.count == 1 else { | ||
| throw TemplateSyntaxError("'split' filter takes a single argument") |
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Looks like copy/paste error with filter name (split -> valueForKey)
| let result = try template.render(Context(dictionary: ["key": "name", "value": ["name": "One"]])) | ||
| try expect(result) == "One" | ||
| } | ||
| } |
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I think it might be a good idea to include a more complex example which validates that the filter uses the logic for variable lookup (perhaps in future some refactoring could break this currently supported behaviour):
let context: [String: Any] = [
"user": ["name": "Kyle"]
]
let template = Template(templateString: "{{ value|valueForKey:"user.name" }}")|
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| let key = stringify(arguments[0]) | ||
| return try context.push(dictionary: ["filter_value": value as Any]) { | ||
| return try Variable("filter_value.\(key)").resolve(context) |
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I think it would make sense that this could handle arrays, similar to NSArray valueForKey:.
This would allow chaining valueForKey with join.
{{ users|valueForKey:"name"|join }}
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This PR implements the same functionality as #174 but with less confusing API.