How to Fix Column Count Mismatches in GORM Bulk Inserts?

Resolving Column Count Mismatch in Bulk Insert with GORM

In your bulk insert query using GORM, you encountered an error due to a mismatch in column count. This error occurs because you're attempting to pass an interface array as a single argument, which results in an invalid query.

To resolve this issue, you need to utilize the variadic parameter syntax (...). This syntax allows you to pass elements of a slice individually to a function, rather than passing the slice itself. In the case of your bulk insert query, you can use it as follows:

tx.Exec(sqlStr, vals...)

By adding ..., you inform the compiler that you intend to pass each element of vals individually. This generates the desired query string:

INSERT INTO city(code, name) VALUES ('XX1', 'Jakarta'),('XX2', 'Bandung')

Additional Considerations:

• Remember to check for errors returned by Tx.Exec() and handle them accordingly.
• Ensure that the number of elements in vals matches the number of placeholders (?) in your query string.

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