ASeegull/SmartFridge: server/database/postgres.go; 36 LoC

Found a possible issue in [ASeegull/SmartFridge](https://www.github.com/ASeegull/SmartFridge) at [server/database/postgres.go](https://github.com/ASeegull/SmartFridge/blob/5154e44b87d5023ed26c645001b696b1212baebc/server/database/postgres.go#L277-L312)

Below is the message reported by the analyzer for this snippet of code. Beware that the analyzer only reports the first issue it finds, so please do not limit your consideration to the contents of the below message.

> range-loop variable key used in defer or goroutine at line 302

[Click here to see the code in its original context.](https://github.com/ASeegull/SmartFridge/blob/5154e44b87d5023ed26c645001b696b1212baebc/server/database/postgres.go#L277-L312)

Click here to show the 36 line(s) of Go which triggered the analyzer.

```go
for key, recipe := range recipes {
wg.Add(1)
go func(wg *sync.WaitGroup, index int, recipe Recepie) {
var name, unit string
var amount int

defer wg.Done()

rows, err := db.Table("recepies").Select("ingridients.amount, m_units.unit, products.name").
Joins("LEFT JOIN ingridients on ingridients.recipe_id = recepies.id").
Joins("JOIN products on ingridients.product_id = products.id").
Joins("JOIN m_units on m_units.id = products.units").
Where("recepies.id=?", recipe.ID).
Rows()
if err != nil {
return
}
defer rows.Close()
for rows.Next() {
err := rows.Scan(&amount, &unit, &name)
if err != nil {
return
}
if contains(productNameSlice, name) && amount <= productMap[name] {
mu.Lock()
recipes[key].Ingred = append(recipes[key].Ingred, strconv.Itoa(amount)+" "+unit+" "+name)
mu.Unlock()
} else {
return
}
}
mu.Lock()
copyRec = append(copyRec, recipes[key])
mu.Unlock()
}(wg, key, recipe)
}

```

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See the descriptions of the classifications [here](https://github.com/github-vet/rangeclosure-findings#how-can-i-help) for more information.

commit ID: 5154e44b87d5023ed26c645001b696b1212baebc