本文整理汇总了Golang中database/sql.NullFloat64.Valid方法的典型用法代码示例。如果您正苦于以下问题：Golang NullFloat64.Valid方法的具体用法？Golang NullFloat64.Valid怎么用？Golang NullFloat64.Valid使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类database/sql.NullFloat64的用法示例。
在下文中一共展示了NullFloat64.Valid方法的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Golang代码示例。
示例1: AddActivity
func (db *Database) AddActivity(type_id int64, description string, user_id int64, is_public bool, lat, long string) error {
var latitude sql.NullFloat64
var longitude sql.NullFloat64
var err error
if latitude.Float64, err = strconv.ParseFloat(lat, 64); err != nil {
latitude.Valid = false
} else {
latitude.Valid = true
}
if longitude.Float64, err = strconv.ParseFloat(long, 64); err != nil {
longitude.Valid = false
} else {
longitude.Valid = true
}
public := 0
if is_public {
public = 1
}
txn, err := db.conn.Begin()
if err != nil {
log.Printf("Starting transaction failed: %v", err)
return err
}
row := txn.QueryRow("SELECT count(1) FROM activity_type_flags WHERE type_id = ? AND flag_id = ?", type_id, db.flagNameToIdMapping[FLAG_POINT_IN_TIME])
var point_in_time_count int64
if err = row.Scan(&point_in_time_count); err != nil {
log.Printf("row.Scan failed: %v", err)
txn.Rollback()
return err
}
result, err := txn.Exec("INSERT INTO activities (type_id, timestamp, description, user_id, public, latitude, longitude) VALUES (?, NOW(), ?, ?, ?, ?, ?)", type_id, description, user_id, public, latitude, longitude)
if err == nil {
activity_id, _ := result.LastInsertId()
if point_in_time_count != 0 {
_, err = txn.Exec("UPDATE activities SET end_timestamp = NOW() WHERE id = ?", activity_id)
if err != nil {
log.Printf("db.conn.Exec failed: %v", err)
}
}
}
if err != nil {
txn.Rollback()
} else {
err = txn.Commit()
if err != nil {
log.Printf("committing transaction failed: %v", err)
}
}
return err
}示例2: checkFloatForNull
func checkFloatForNull(eventFloat string, event *sql.NullFloat64) {
var err error
if eventFloat == "" {
event.Valid = false
} else {
event.Float64, err = strconv.ParseFloat(eventFloat, 64)
if err != nil {
event.Valid = false
return
}
event.Valid = true
}
}示例3: AddActivity
func AddActivity(w http.ResponseWriter, r *http.Request) {
session, _ := store.Get(r, SESSION_NAME)
if authenticated, ok := session.Values["Authenticated"].(bool); !ok || !authenticated {
http.Error(w, "unauthenticated", http.StatusForbidden)
return
}
username := session.Values["UserName"].(string)
user_id := session.Values["UserId"].(int64)
type_id := r.FormValue("type_id")
description := r.FormValue("desc")
is_public := 0
if r.FormValue("public") == "on" {
is_public = 1
}
var err error
var latitude sql.NullFloat64
var longitude sql.NullFloat64
if latitude.Float64, err = strconv.ParseFloat(r.FormValue("lat"), 64); err != nil {
latitude.Valid = false
} else {
latitude.Valid = true
}
if longitude.Float64, err = strconv.ParseFloat(r.FormValue("long"), 64); err != nil {
longitude.Valid = false
} else {
longitude.Valid = true
}
if _, err := db.Exec("INSERT INTO activities (type_id, timestamp, description, user_id, public, latitude, longitude) VALUES (?, NOW(), ?, ?, ?, ?, ?)", type_id, description, user_id, is_public, latitude, longitude); err != nil {
log.Printf("AddActivity: db.Exec failed: %v", err)
} else {
log.Printf("added activity %s (type_id = %s) for user %s", description, type_id, username)
}
fmt.Fprintf(w, "OK")
}示例4: CreateNullFloat64
func CreateNullFloat64(v float64) sql.NullFloat64 {
var ni sql.NullFloat64
ni.Valid = true
ni.Float64 = v
return ni
}