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add support for slice to the Expr #33

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add support for slice to the Expr #33

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21 changes: 21 additions & 0 deletions expr.go
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,27 @@ func Expr(sql string, args ...interface{}) expr {
return expr{sql: sql, args: args}
}

func ExprSlice(sql string, size int, args ...interface{}) expr {
if len(args) != 1 {
return expr{sql: sql, args: args}
}

b := make([]interface{}, size)

switch t := args[0].(type) {
case []string:
for i := range t {
b[i] = t[i]
}
case []int:
for i := range t {
b[i] = t[i]
}
}

return expr{sql: sql, args: b}
}

func (e expr) ToSql() (sql string, args []interface{}, err error) {
return e.sql, e.args, nil
}
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