How Can I Directly Insert a Struct into a PostgreSQL Database Using SQLx?

Directly Inserting a Struct into a PostgreSQL Database

Introduction

In your scenario, where your struct has numerous fields, manually inserting data one by one can be tedious. This article explores how to directly insert an entire struct into a PostgreSQL database using the "sqlx" library.

Using SQLx to Insert a Struct

The "sqlx" library provides a convenient way to interact with your database. It supports "NamedExec" function, which allows you to easily pass a struct as an argument to insert data.

Defining Database Tags

To use "NamedExec", you need to define "db" tags for each field in your struct. These tags specify the corresponding column names in your database table.

Example:

<code class="go">type ApplyLeave1 struct {
    LeaveId           int       `db:"leaveid"`
    EmpId             string    `db:"empid"`
    SupervisorEmpId   string    `db:"supervisorid"`
}</code>

Inserting the Struct

Once your tags are defined, you can use "NamedExec" to insert your data:

<code class="go">db, err := sqlx.Connect("postgres", "user=foo dbname=bar sslmode=disable")
if err != nil {
    log.Fatalln(err)
}

query := `INSERT INTO TABLENAME(leaveid, empid, supervisorid) 
          VALUES(:leaveid, :empid, :supervisorid)`

var leave1 ApplyLeave1
_, err = db.NamedExec(query, leave1)
if err != nil {
    log.Fatalln(err)
}</code>

By using "NamedExec", you can conveniently insert the entire struct into your database in one go, reducing the need for repetitive manual insertions.

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