[Form] NumberType: Fix parsing of numbers in exponential notation with negative exponent #57861
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Hey! Thanks for your PR. You are targeting branch "7.1" but it seems your PR description refers to branch "5.4, 6.4, 7.0, and 7.1 for bug fixes". Cheers! Carsonbot |
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Is 5.4 not affected by this? Also we need some tests to prevent regressions. |
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@xabbuh Yes Symfony 5.4 (and all other currently supported versions) are affected by this bug, as the relevant code parts were not changed for a while. I also added some tests for the parsing of numbers in e-notation, which was not covered by tests before. These should also prevent regression of this issue. |
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Thank you @jbtronics. |
This was referenced Aug 30, 2024
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Currently, when inputting a string like "1E-3" into a NumberType leads incorrectly to a result of "0". The correct result would be "0.001", which is also the result, when inputting "1.0E-3".
This is caused by
NumberToLocalizedStringTransformer, which assumes that the result must be a integer, if the string does not contain the decimal separator. However, this behavior is incorrect, if the string is in exponential notation with negative exponent.The NumberFormatter can correctly parse this format, but it needs to be told that the result should be a double (otherwise its gets incorrectly rounded to 0)
To fix this behavior, I added a check for the negative exponential format, which then results in a double result.