Have added a listAll handler for new operation model

This is the first attempt at querying a table with a foreign key
relation and returning the result to be used in Go code. Learned quite a
bit! Including getting a null pointer error because I forgot to
initialise the sql.DB in the application structure.

1 files changed, 38 insertions, 5 deletions

diff --git a/internal/models/operation.go b/internal/models/operation.go
index 8547030..abb874c 100644
--- a/internal/models/operation.go
+++ b/internal/models/operation.go
@@ -2,15 +2,48 @@ package models
 
 import (
 	"database/sql"
+	"time"
 )
 
 type Operation struct {
-	ID           int
-	Name         string
-	Description  string
-	Organisation Organisation
+	ID               int
+	Name             string
+	Description      string
+	Created          time.Time
+	OrganisationName string
 }
 
-type OperationMOdel struct {
+type OperationModel struct {
 	DB *sql.DB
 }
+
+func (m *OperationModel) ListAll() ([]Operation, error) {
+
+	stmt := `SELECT op.id, op.name, op.description, op.created, org.name FROM operations op INNER JOIN organisations org ON op.organisation_id=org.id`
+
+	// stmt := `SELECT * FROM operations`
+
+	rows, err := m.DB.Query(stmt)
+	if err != nil {
+		return nil, err
+	}
+
+	defer rows.Close()
+
+	var ops []Operation
+
+	for rows.Next() {
+		var o Operation
+		err = rows.Scan(&o.ID, &o.Name, &o.Description, &o.Created, &o.OrganisationName)
+		if err != nil {
+			return nil, err
+		}
+
+		ops = append(ops, o)
+	}
+
+	if err = rows.Err(); err != nil {
+		return nil, err
+	}
+	return ops, err
+}