+
+ +
+
+ +
+ +

Dialects

+ +

Dialect Specific Columns

+

Certain dialects of SQL ship with their own custom, non-standard column types, such as the jsonb column in PostgreSQL. GORM supports loading several of such types, as listed in the following sections.

+

PostgreSQL

+

GORM supports loading the following PostgreSQL exclusive column types:

+
    +
  • jsonb
    • +
  • hstore
    • +
+

Given the following Model definition:

+
import (
+    "encoding/json"
+    "fmt"
+    "reflect"
+    "github.com/jinzhu/gorm"
+    "github.com/jinzhu/gorm/dialects/postgres"
+)
+
+type Document struct {
+    Metadata    postgres.Jsonb        
+    Secrets     postgres.Hstore     
+    Body        string
+
+    ID          int   
+}
+
+

You may use the model like so:

+
password := "0654857340"
+metadata := json.RawMessage(`{"is_archived": 0}`)
+sampleDoc := Document{
+    Body : "This is a test document",
+    Metadata : postgres.Jsonb{ metadata },
+    Secrets : postgres.Hstore{"password" : &password },
+}
+
+//insert sampleDoc into the database
+db.Create(&sampleDoc)
+
+//retrieve the fields again to confirm if they were inserted correctly
+resultDoc := Document{}
+db.Where("id = ?", sampleDoc.ID).First(&resultDoc)
+
+metadataIsEqual := reflect.DeepEqual( resultDoc.Metadata, sampleDoc.Metadata)
+secretsIsEqual := reflect.DeepEqual( resultDoc.Secrets, resultDoc.Secrets)
+
+//this should print "true"
+fmt.Println("Inserted fields are as expected:", metadataIsEqual && secretsIsEqual)
+
+ + +
+ +
+
+
+ +

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