Question 1

How to map fields with different names in Deepcopier?

Accepted Answer

Use the 'field' struct tag in the destination struct, like `DisplayName string `deepcopier:"field:Name"``. This copies the value from the source's 'Name' field to 'DisplayName', as shown in the README example.

Question 2

Can Deepcopier handle nested structs or slices?

Accepted Answer

The README doesn't explicitly cover nested structs or slices. While reflection might handle them, for complex nested data, you may need additional testing or manual configuration, as Deepcopier focuses on basic field mapping.

Question 3

Deepcopier vs copier: which is better for Go?

Accepted Answer

Deepcopier excels with context-aware methods and SQL null handling, while copier might offer different features like error propagation. Choose Deepcopier if you need declarative mapping with context; otherwise, evaluate based on specific use cases like performance or ecosystem support.

Question 4

How to pass context to methods during copy in Deepcopier?

Accepted Answer

Use the 'WithContext' method with a map and tag methods with 'context', as in the example where `Copy(user).WithContext(map[string]interface{}{"foo": "bar"}).To(resource)` passes context to 'MethodThatTakesContext'.

Question 5

Does Deepcopier support copying pointers or interfaces?

Accepted Answer

The documentation doesn't detail support for pointers or interfaces. It likely handles basic types and structs via reflection, but for advanced types, you might need to consult the source code or test thoroughly.

Question 6

What's the performance impact of using Deepcopier?

Accepted Answer

Deepcopier uses reflection, which can be slower than manual struct assignment. In performance-critical applications, benchmark it against alternatives, as the overhead might not be negligible for large-scale or frequent copying.

Deepcopier

What is Deepcopier?

Overview

Use Cases

Best For

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Pros & Cons

Pros

Cons

Frequently Asked Questions