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zhangwenjian
d4cf11d313
opens is a map, so opens[c.Driver] on a driver this build does not carry returns a nil function, and gorm.Open calls it. The operator saw a nil dereference inside gorm with nothing naming the driver. sqlite3 is the case that bites: it needs cgo and is only compiled in under the sqlite3 build tag, so the same config file works on one binary and dies on another. Resolve the driver first and say which ones this build supports.
35 lines
958 B
Go
35 lines
958 B
Go
package database
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import (
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"fmt"
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"sort"
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"strings"
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"gorm.io/gorm"
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)
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// openerFor resolves the gorm dialector registered for driver.
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//
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// Which drivers exist depends on how the binary was built: sqlite3 needs cgo
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// and is only compiled in under the sqlite3 build tag. A configuration naming a
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// driver this build does not carry used to reach gorm.Open with a nil function,
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// which is a nil dereference deep in the stack rather than an answer.
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func openerFor(driver string) (func(string) gorm.Dialector, error) {
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open, ok := opens[driver]
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if !ok {
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return nil, fmt.Errorf("unsupported database driver %q, this build supports %s",
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driver, strings.Join(supportedDrivers(), ", "))
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}
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return open, nil
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}
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// supportedDrivers lists what this build can open, in a stable order.
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func supportedDrivers() []string {
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names := make([]string, 0, len(opens))
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for name := range opens {
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names = append(names, name)
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}
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sort.Strings(names)
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return names
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}
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