ent/entc/gen/template/migrate/migrate.tmpl

{{ define "migrate" }}
{{ template "header" "migrate" }}

import (
	"fbc/ent/field"
	"fbc/ent/dialect/sql/schema"
)

var (
	nullable = true
	{{- range $_, $t := $.Tables }}
		{{- $columns := pascal $t.Name | printf "%sColumns" }}
		// {{ $columns }} holds the columns for the "{{ $t.Name }}" table.
		{{ $columns }} = []*schema.Column{
			{{- range $_, $c := $t.Columns }}
				{ Name: "{{ $c.Name }}", Type: field.{{ $c.Type.ConstName }},
				{{- if $c.Unique }} Unique: true,{{ end }}
				{{- if $c.Increment }} Increment: true,{{ end }}
				{{- if $c.Nullable }} Nullable: &nullable,{{ end }}
				{{- with $c.Size }} Size: {{ . }},{{ end }}
				{{- with $c.Attr }} Attr: "{{ . }}",{{ end }}
				{{- with $c.Default }} Default: "{{ . }}",{{ end }} },
			{{- end }}
		}
		{{- $table := pascal $t.Name | printf "%sTable" }}
		// {{ $table }} holds the schema information for the "{{ $t.Name }}" table.
		{{ $table }} = &schema.Table{
			Name: "{{ $t.Name }}",
			Columns: {{ $columns }},
			PrimaryKey: []*schema.Column{
				{{- range $_, $pk := $t.PrimaryKey }}
					{{- range $i, $c := $t.Columns }}
						{{- if eq $pk.Name $c.Name }}{{ $columns }}[{{ $i }}],{{ end }}
					{{- end }}
				{{- end }}
			},
			ForeignKeys: []*schema.ForeignKey{
				{{- range $_, $fk := $t.ForeignKeys }}
					{
						Symbol: "{{ $fk.Symbol }}",
						Columns: []*schema.Column{
					  		{{- range $_, $c1 := $fk.Columns }}
								{{- range $i, $c2 := $t.Columns }}
									{{- if eq $c1.Name $c2.Name }}{{ $columns }}[{{ $i }}],{{ end }}
								{{- end }}
							{{- end }}
						},
						{{/* postpone refrencing to avoid typechecking loops */}}
						RefColumns: []*schema.Column{
					  		{{- range $_, $c1 := $fk.RefColumns }}
								{{- range $i, $c2 := $fk.RefTable.Columns }}
									{{- if eq $c1.Name $c2.Name }}{{ pascal $fk.RefTable.Name | printf "%sColumns" }}[{{ $i }}],{{ end }}
								{{- end }}
							{{- end }}
						},
						{{- with $fk.OnUpdate.ConstName }}
							OnUpdate: schema.{{ . }},
						{{- end }}
						{{- with $fk.OnDelete.ConstName }}
							OnDelete: schema.{{ . }},
						{{- end }}
					},
				{{- end }}
			},
		}
	{{- end }}
	// Tables holds all the tables in the schema.
	Tables = []*schema.Table{
		{{- range $_, $t := $.Tables }}
			{{ pascal $t.Name | printf "%sTable" }},
		{{- end }}
	}
)

func init() {
	{{- range $_, $t := $.Tables }}
		{{- $table := pascal $t.Name | printf "%sTable" }}
		{{- range $i, $fk := $t.ForeignKeys }}
			{{ $table }}.ForeignKeys[{{ $i }}].RefTable = {{ pascal $fk.RefTable.Name | printf "%sTable" }}
		{{- end }}
	{{- end }}
}

{{ end }}