如何指定数组gorm golang的默认值？

Question

I use gorm and postgresql, this is model

type Board struct {
    Id     uint `gorm:"primaryKey;autoIncrement;unique" json:"id"`
    Owner  uint `json:"owner"`
    Name string `json:"name"`
    Contributors []int `gorm:"type:jsonb" json:"contributors"`
    GeneratedLink string `gorm:"default:''" json:"generated_link"`
    Todos []TodoStructure `gorm:"type:jsonb;default:[]" json:"todos"`
}

type TodoStructure struct {
    Id string
    Text string
    Completed bool
    Important bool
}

in Todo value i specified default value as [] but when i run app i got this error

ERROR: syntax error at or near "[" (SQLSTATE 42601)
[100.528ms] [rows:0] CREATE TABLE "boards" ("id" bigserial UNIQUE,"owner" bigint,"name" text,"contributors" jsonb,"generated_link" text DEFAULT '',"todos" jsonb DEFAULT [],PRIMARY KEY ("id"))
panic: ERROR: syntax error at or near "[" (SQLSTATE 42601)

so how to specify array as default value?

Answer 1

try putting quotes like this gorm:"type:jsonb;default:'[]'" json:"todos"

type Board struct {
    Id     uint `gorm:"primaryKey;autoIncrement;unique" json:"id"`
    Owner  uint `json:"owner"`
    Name string `json:"name"`
    Contributors []int `gorm:"type:jsonb" json:"contributors"`
    GeneratedLink string `gorm:"default:''" json:"generated_link"`
    Todos []TodoStructure `gorm:"type:jsonb;default:'[]'" json:"todos"`
}

for more reference you can refer this link