Name mapping rules

Name mapping rules

2.1. Name mapping rules

Use names.Mapper interface to set the name mapping rule. There are three rules: SnakeMapper, SameMapper, and GonicMapper.

• SnakeMapper inserts an _ (underscore) between each word (Capital Case) to get the table name or column name.
• SameMapper uses the same name between the struct and table.
• GonicMapper is basically the same as SnakeMapper, but doesn’t insert an underscore between commonly used acronyms. For example ID is converted to id in GonicMapper, but ID is converted to i_d in SnakeMapper.

SnakeMapper is the default. You can change it use SetMapper.

engine.SetMapper(names.SameMapper{})

And you should notice:

• If you want to use other mapping rule, implement IMapper
• Tables’s mapping rule could be different from Columns’:

engine.SetTableMapper(names.SameMapper{})
engine.SetColumnMapper(names.SnakeMapper{})

When a struct auto mapping to a database’s table, the below table describes how they change to each other: