No error, when there are no items in CSV file during struct deserializing (with serde)

[codercengiz]

Problem:

When deserializing a CSV file with only headers without any other rows into a struct (with serde), It doesn't give any error, and the records count is 0.

In this case, it may give an error, and can be stated that there must be at least one item in the csv file

[BurntSushi]

An empty CSV file (including a CSV file with a single header row) is a valid CSV file. If it doesn't work for your specific use case, then your code should return an error. I don't see a reason why this crate should return an error.

Also, I don't know what serde has to do with this. It seems orthogonal.

[codercengiz]

Yes, you are right, but this issue is more about headers. I think I misdescribed the problem.

In this case, it does not give an error even if the headers are not compatible with the struct,

for example struct structure:

pub struct ProductCreate {
    pub model: String,
    pub brand: String,
    pub description: Option<String>,
    pub classification: Option<String>,
    pub sales_type: Option<String>,
}

example csv:
model;description;classification;sales_type it has only headers row without brand
Expected error: must exist model header

One more example csv file:
firstname;lastname;email it has only headers but is completely different from the struct.
Expected error: must exist model and brand headers

I think, In this case, it would be better to have an error.

[BurntSushi]

I don't think this is possible to implement with serde.