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db_test.go
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package pg_test
import (
"bytes"
"context"
"crypto/tls"
"database/sql"
"fmt"
"net"
"testing"
"time"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
"github.com/go-pg/pg"
"github.com/go-pg/pg/orm"
)
func TestGinkgo(t *testing.T) {
RegisterFailHandler(Fail)
RunSpecs(t, "pg")
}
func pgOptions() *pg.Options {
return &pg.Options{
User: "postgres",
Database: "postgres",
TLSConfig: &tls.Config{
InsecureSkipVerify: true,
},
MaxRetries: 1,
MinRetryBackoff: -1,
DialTimeout: 30 * time.Second,
ReadTimeout: 10 * time.Second,
WriteTimeout: 10 * time.Second,
PoolSize: 10,
MaxConnAge: 10 * time.Second,
PoolTimeout: 30 * time.Second,
IdleTimeout: 10 * time.Second,
IdleCheckFrequency: 100 * time.Millisecond,
}
}
var _testDB *pg.DB
func testDB() *pg.DB {
if _testDB == nil {
_testDB = pg.Connect(pgOptions())
}
return _testDB
}
func TestDBString(t *testing.T) {
db := pg.Connect(pgOptions())
defer db.Close()
wanted := `DB<Addr="localhost:5432">`
if db.String() != wanted {
t.Fatalf("got %q, wanted %q", db.String(), wanted)
}
db = db.WithParam("param1", "value1").WithParam("param2", 2)
wanted = `DB<Addr="localhost:5432" param1=value1 param2=2>`
if db.String() != wanted {
t.Fatalf("got %q, wanted %q", db.String(), wanted)
}
}
func TestOnConnect(t *testing.T) {
opt := pgOptions()
opt.OnConnect = func(db *pg.Conn) error {
_, err := db.Exec("SET application_name = 'myapp'")
return err
}
db := pg.Connect(opt)
defer db.Close()
var name string
_, err := db.QueryOne(pg.Scan(&name), "SHOW application_name")
if err != nil {
t.Fatal(err)
}
if name != "myapp" {
t.Fatalf(`got %q, wanted "myapp"`, name)
}
}
func TestEmptyQuery(t *testing.T) {
db := pg.Connect(pgOptions())
defer db.Close()
assert := func(err error) {
if err == nil {
t.Fatal("error expected")
}
if err.Error() != "pg: query is empty" {
t.Fatal(err)
}
}
_, err := db.Exec("")
assert(err)
_, err = db.Query(pg.Discard, "")
assert(err)
stmt, err := db.Prepare("")
if err != nil {
t.Fatal(err)
}
_, err = stmt.Exec()
assert(err)
}
func TestAnynomousStructField(t *testing.T) {
type MyInt struct{ int }
type MyStruct struct {
Ints []MyInt `pg:",array"`
}
db := testDB()
var st MyStruct
_, err := db.Query(&st, "SELECT ARRAY[1,2,3,4] AS ints")
wanted := "json: cannot unmarshal number into Go value of type pg_test.MyInt"
if err.Error() != wanted {
t.Fatal(err)
}
}
var _ = Describe("DB", func() {
var db *pg.DB
var tx *pg.Tx
BeforeEach(func() {
db = pg.Connect(pgOptions())
var err error
tx, err = db.Begin()
Expect(err).NotTo(HaveOccurred())
})
AfterEach(func() {
Expect(db.Close()).NotTo(HaveOccurred())
})
Describe("Query", func() {
It("does not return an error when there are no results", func() {
res, err := db.Query(pg.Discard, "SELECT 1 WHERE 1 = 2")
Expect(err).NotTo(HaveOccurred())
Expect(res.RowsAffected()).To(Equal(0))
res, err = tx.Query(pg.Discard, "SELECT 1 WHERE 1 = 2")
Expect(err).NotTo(HaveOccurred())
Expect(res.RowsAffected()).To(Equal(0))
})
It("selects into embedded struct pointer", func() {
type One struct {
ID int
}
type Two struct {
*One
}
two := new(Two)
_, err := db.QueryOne(two, "SELECT 1 AS id")
Expect(err).NotTo(HaveOccurred())
Expect(two.One.ID).To(Equal(1))
})
})
Describe("QueryOne", func() {
It("returns pg.ErrNoRows when there are no results", func() {
_, err := db.QueryOne(pg.Discard, "SELECT 1 WHERE 1 = 2")
Expect(err).To(Equal(pg.ErrNoRows))
_, err = tx.QueryOne(pg.Discard, "SELECT 1 WHERE 1 = 2")
Expect(err).To(Equal(pg.ErrNoRows))
})
})
Describe("Exec", func() {
It("does not return an error when there are no results", func() {
res, err := db.Exec("SELECT 1 WHERE 1 = 2")
Expect(err).NotTo(HaveOccurred())
Expect(res.RowsAffected()).To(Equal(0))
res, err = tx.Exec("SELECT 1 WHERE 1 = 2")
Expect(err).NotTo(HaveOccurred())
Expect(res.RowsAffected()).To(Equal(0))
})
})
Describe("ExecOne", func() {
It("returns pg.ErrNoRows when there are no results", func() {
_, err := db.ExecOne("SELECT 1 WHERE 1 = 2")
Expect(err).To(Equal(pg.ErrNoRows))
_, err = tx.ExecOne("SELECT 1 WHERE 1 = 2")
Expect(err).To(Equal(pg.ErrNoRows))
})
})
Describe("Prepare", func() {
It("returns an error when query can't be prepared", func() {
for i := 0; i < 3; i++ {
_, err := db.Prepare("totally invalid sql")
Expect(err).To(MatchError(`ERROR #42601 syntax error at or near "totally"`))
_, err = db.Exec("SELECT 1")
Expect(err).NotTo(HaveOccurred())
}
})
})
Describe("Context", func() {
It("cancels query when context is cancelled", func() {
start := time.Now()
c, cancel := context.WithTimeout(context.Background(), time.Second)
defer cancel()
_, err := db.ExecContext(c, "SELECT pg_sleep(5)")
Expect(err).To(HaveOccurred())
Expect(time.Since(start)).To(BeNumerically("~", time.Second, 100*time.Millisecond))
})
})
})
var _ = Describe("DB.Conn", func() {
var db *pg.DB
BeforeEach(func() {
db = pg.Connect(pgOptions())
})
AfterEach(func() {
Expect(db.Close()).NotTo(HaveOccurred())
})
It("does not ackquire connection immediately", func() {
conn := db.Conn()
stats := db.PoolStats()
Expect(stats.TotalConns).To(Equal(uint32(0)))
err := conn.Close()
Expect(err).NotTo(HaveOccurred())
})
It("ackquires connection when used and frees when closed", func() {
conn := db.Conn()
_, err := conn.Exec("SELECT 1")
Expect(err).NotTo(HaveOccurred())
stats := db.PoolStats()
Expect(stats.TotalConns).To(Equal(uint32(1)))
Expect(stats.IdleConns).To(Equal(uint32(0)))
err = conn.Close()
Expect(err).NotTo(HaveOccurred())
stats = db.PoolStats()
Expect(stats.TotalConns).To(Equal(uint32(1)))
Expect(stats.IdleConns).To(Equal(uint32(1)))
})
It("supports Tx", func() {
conn := db.Conn()
tx, err := conn.Begin()
Expect(err).NotTo(HaveOccurred())
_, err = tx.Exec("SELECT 1")
Expect(err).NotTo(HaveOccurred())
_, err = conn.Exec("SELECT 1")
Expect(err).NotTo(HaveOccurred())
err = tx.Commit()
Expect(err).NotTo(HaveOccurred())
_, err = conn.Exec("SELECT 1")
Expect(err).NotTo(HaveOccurred())
err = conn.Close()
Expect(err).NotTo(HaveOccurred())
stats := db.PoolStats()
Expect(stats.TotalConns).To(Equal(uint32(1)))
Expect(stats.IdleConns).To(Equal(uint32(1)))
})
})
var _ = Describe("Time", func() {
var tests = []struct {
str string
wanted time.Time
}{
{"0001-01-01 00:00:00+00", time.Time{}},
{"0000-01-01 00:00:00+00", time.Date(0, time.January, 1, 0, 0, 0, 0, time.UTC)},
{"2001-02-03", time.Date(2001, time.February, 3, 0, 0, 0, 0, time.UTC)},
{"2001-02-03 04:05:06", time.Date(2001, time.February, 3, 4, 5, 6, 0, time.UTC)},
{"2001-02-03 04:05:06.000001", time.Date(2001, time.February, 3, 4, 5, 6, 1000, time.UTC)},
{"2001-02-03 04:05:06.00001", time.Date(2001, time.February, 3, 4, 5, 6, 10000, time.UTC)},
{"2001-02-03 04:05:06.0001", time.Date(2001, time.February, 3, 4, 5, 6, 100000, time.UTC)},
{"2001-02-03 04:05:06.001", time.Date(2001, time.February, 3, 4, 5, 6, 1000000, time.UTC)},
{"2001-02-03 04:05:06.01", time.Date(2001, time.February, 3, 4, 5, 6, 10000000, time.UTC)},
{"2001-02-03 04:05:06.1", time.Date(2001, time.February, 3, 4, 5, 6, 100000000, time.UTC)},
{"2001-02-03 04:05:06.12", time.Date(2001, time.February, 3, 4, 5, 6, 120000000, time.UTC)},
{"2001-02-03 04:05:06.123", time.Date(2001, time.February, 3, 4, 5, 6, 123000000, time.UTC)},
{"2001-02-03 04:05:06.1234", time.Date(2001, time.February, 3, 4, 5, 6, 123400000, time.UTC)},
{"2001-02-03 04:05:06.12345", time.Date(2001, time.February, 3, 4, 5, 6, 123450000, time.UTC)},
{"2001-02-03 04:05:06.123456", time.Date(2001, time.February, 3, 4, 5, 6, 123456000, time.UTC)},
{"2001-02-03 04:05:06.123-07", time.Date(2001, time.February, 3, 4, 5, 6, 123000000, time.FixedZone("", -7*60*60))},
{"2001-02-03 04:05:06-07", time.Date(2001, time.February, 3, 4, 5, 6, 0, time.FixedZone("", -7*60*60))},
{"2001-02-03 04:05:06-07:42", time.Date(2001, time.February, 3, 4, 5, 6, 0, time.FixedZone("", -(7*60*60+42*60)))},
{"2001-02-03 04:05:06-07:30:09", time.Date(2001, time.February, 3, 4, 5, 6, 0, time.FixedZone("", -(7*60*60+30*60+9)))},
{"2001-02-03 04:05:06+07", time.Date(2001, time.February, 3, 4, 5, 6, 0, time.FixedZone("", 7*60*60))},
}
var db *pg.DB
BeforeEach(func() {
db = pg.Connect(pgOptions())
})
AfterEach(func() {
Expect(db.Close()).NotTo(HaveOccurred())
})
It("is formatted correctly", func() {
for i, test := range tests {
var tm time.Time
_, err := db.QueryOne(pg.Scan(&tm), "SELECT ?", test.wanted)
Expect(err).NotTo(HaveOccurred())
Expect(tm.Unix()).To(
Equal(test.wanted.Unix()),
"#%d str=%q wanted=%q", i, test.str, test.wanted,
)
}
})
It("is parsed correctly", func() {
for i, test := range tests {
var tm time.Time
_, err := db.QueryOne(pg.Scan(&tm), "SELECT ?", test.str)
Expect(err).NotTo(HaveOccurred())
Expect(tm.Unix()).To(
Equal(test.wanted.Unix()),
"#%d str=%q wanted=%q", i, test.str, test.wanted,
)
}
})
})
var _ = Describe("array model", func() {
type value struct {
Values []int16 `sql:",array"`
}
var db *pg.DB
BeforeEach(func() {
db = pg.Connect(pgOptions())
})
AfterEach(func() {
Expect(db.Close()).NotTo(HaveOccurred())
})
It("selects values", func() {
model := new(value)
_, err := db.QueryOne(model, "SELECT ? AS values", pg.Array([]int16{1, 2}))
Expect(err).NotTo(HaveOccurred())
Expect(model.Values).To(Equal([]int16{1, 2}))
})
It("selects empty values", func() {
model := &value{
Values: []int16{1, 2},
}
_, err := db.QueryOne(model, "SELECT ? AS values", pg.Array([]int16{}))
Expect(err).NotTo(HaveOccurred())
Expect(model.Values).To(BeEmpty())
})
It("selects null values", func() {
model := &value{
Values: []int16{1, 2},
}
_, err := db.QueryOne(model, "SELECT NULL AS values", pg.Array([]int16{}))
Expect(err).NotTo(HaveOccurred())
Expect(model.Values).To(BeEmpty())
})
})
var _ = Describe("slice model", func() {
type value struct {
Id int
}
var db *pg.DB
BeforeEach(func() {
db = pg.Connect(pgOptions())
})
AfterEach(func() {
Expect(db.Close()).NotTo(HaveOccurred())
})
It("does not error when there are no rows", func() {
ints := make([]int, 1)
_, err := db.Query(&ints, "SELECT generate_series(1, 0)")
Expect(err).NotTo(HaveOccurred())
Expect(ints).To(BeEmpty())
})
It("does not error when there are no rows", func() {
slice := make([]value, 1)
_, err := db.Query(&slice, "SELECT generate_series(1, 0)")
Expect(err).NotTo(HaveOccurred())
Expect(slice).To(BeEmpty())
})
It("does not error when there are no rows", func() {
slice := make([]*value, 1)
_, err := db.Query(&slice, "SELECT generate_series(1, 0)")
Expect(err).NotTo(HaveOccurred())
Expect(slice).To(BeEmpty())
})
It("supports slice of structs", func() {
var slice []value
_, err := db.Query(&slice, `SELECT generate_series(1, 3) AS id`)
Expect(err).NotTo(HaveOccurred())
Expect(slice).To(Equal([]value{{1}, {2}, {3}}))
})
It("supports slice of pointers", func() {
var slice []*value
_, err := db.Query(&slice, `SELECT generate_series(1, 3) AS id`)
Expect(err).NotTo(HaveOccurred())
Expect(slice).To(Equal([]*value{{1}, {2}, {3}}))
})
It("supports Ints", func() {
var ints pg.Ints
_, err := db.Query(&ints, `SELECT generate_series(1, 3)`)
Expect(err).NotTo(HaveOccurred())
Expect(ints).To(Equal(pg.Ints{1, 2, 3}))
})
It("supports slice of ints", func() {
var ints []int
_, err := db.Query(&ints, `SELECT generate_series(1, 3)`)
Expect(err).NotTo(HaveOccurred())
Expect(ints).To(Equal([]int{1, 2, 3}))
})
It("supports slice of time.Time", func() {
var times []time.Time
_, err := db.Query(×, `
WITH data (time) AS (VALUES (clock_timestamp()), (clock_timestamp()))
SELECT time FROM data
`)
Expect(err).NotTo(HaveOccurred())
Expect(times).To(HaveLen(2))
})
It("resets slice", func() {
ints := []int{1, 2, 3}
_, err := db.Query(&ints, `SELECT 1`)
Expect(err).NotTo(HaveOccurred())
Expect(ints).To(Equal([]int{1}))
})
It("resets slice when there are no results", func() {
ints := []int{1, 2, 3}
_, err := db.Query(&ints, `SELECT 1 WHERE FALSE`)
Expect(err).NotTo(HaveOccurred())
Expect(ints).To(BeEmpty())
})
})
var _ = Describe("read/write timeout", func() {
var db *pg.DB
BeforeEach(func() {
opt := pgOptions()
opt.ReadTimeout = time.Millisecond
db = pg.Connect(opt)
})
AfterEach(func() {
Expect(db.Close()).NotTo(HaveOccurred())
})
It("slow query timeouts", func() {
_, err := db.Exec(`SELECT pg_sleep(1)`)
Expect(err.(net.Error).Timeout()).To(BeTrue())
})
Context("WithTimeout", func() {
It("slow query passes", func() {
_, err := db.WithTimeout(time.Minute).Exec(`SELECT pg_sleep(1)`)
Expect(err).NotTo(HaveOccurred())
})
})
})
var _ = Describe("CopyFrom/CopyTo", func() {
const n = 1000000
var db *pg.DB
BeforeEach(func() {
db = pg.Connect(pgOptions())
qs := []string{
"CREATE TEMP TABLE copy_src(n int)",
"CREATE TEMP TABLE copy_dst(n int)",
fmt.Sprintf("INSERT INTO copy_src SELECT generate_series(1, %d)", n),
}
for _, q := range qs {
_, err := db.Exec(q)
Expect(err).NotTo(HaveOccurred())
}
})
AfterEach(func() {
err := db.Close()
Expect(err).NotTo(HaveOccurred())
})
It("copies data from a table and to a table", func() {
var buf bytes.Buffer
res, err := db.CopyTo(&buf, "COPY copy_src TO STDOUT")
Expect(err).NotTo(HaveOccurred())
Expect(res.RowsAffected()).To(Equal(n))
res, err = db.CopyFrom(&buf, "COPY copy_dst FROM STDIN")
Expect(err).NotTo(HaveOccurred())
Expect(res.RowsAffected()).To(Equal(n))
st := db.PoolStats()
Expect(st.Hits).To(Equal(uint32(4)))
Expect(st.Misses).To(Equal(uint32(1)))
Expect(st.Timeouts).To(Equal(uint32(0)))
Expect(st.TotalConns).To(Equal(uint32(1)))
Expect(st.IdleConns).To(Equal(uint32(1)))
var count int
_, err = db.QueryOne(pg.Scan(&count), "SELECT count(*) FROM copy_dst")
Expect(err).NotTo(HaveOccurred())
Expect(count).To(Equal(n))
})
It("copies corrupted data to a table", func() {
buf := bytes.NewBufferString("corrupted,data\nrow,two\r\nrow three")
res, err := db.CopyFrom(buf, "COPY copy_dst FROM STDIN WITH FORMAT csv")
Expect(err).To(MatchError(`ERROR #42601 syntax error at or near "FORMAT"`))
Expect(res).To(BeNil())
st := db.Pool().Stats()
Expect(st.Hits).To(Equal(uint32(3)))
Expect(st.Misses).To(Equal(uint32(1)))
Expect(st.Timeouts).To(Equal(uint32(0)))
Expect(st.TotalConns).To(Equal(uint32(1)))
Expect(st.IdleConns).To(Equal(uint32(1)))
var count int
_, err = db.QueryOne(pg.Scan(&count), "SELECT count(*) FROM copy_dst")
Expect(err).NotTo(HaveOccurred())
Expect(count).To(Equal(0))
})
})
var _ = Describe("CountEstimate", func() {
var db *pg.DB
BeforeEach(func() {
db = pg.Connect(pgOptions())
})
AfterEach(func() {
Expect(db.Close()).NotTo(HaveOccurred())
})
It("works", func() {
count, err := db.Model().
TableExpr("generate_series(1, 10)").
CountEstimate(1000)
Expect(err).NotTo(HaveOccurred())
Expect(count).To(Equal(10))
})
It("works when there are no results", func() {
count, err := db.Model().
TableExpr("generate_series(1, 0)").
CountEstimate(1000)
Expect(err).NotTo(HaveOccurred())
Expect(count).To(Equal(0))
})
It("works with GROUP", func() {
count, err := db.Model().
TableExpr("generate_series(1, 10)").
Group("generate_series").
CountEstimate(1000)
Expect(err).NotTo(HaveOccurred())
Expect(count).To(Equal(10))
})
It("works with GROUP when there are no results", func() {
count, err := db.Model().
TableExpr("generate_series(1, 0)").
Group("generate_series").
CountEstimate(1000)
Expect(err).NotTo(HaveOccurred())
Expect(count).To(Equal(0))
})
})
var _ = Describe("DB nulls", func() {
var db *pg.DB
BeforeEach(func() {
db = pg.Connect(pgOptions())
_, err := db.Exec("CREATE TEMP TABLE tests (id int, value int)")
Expect(err).To(BeNil())
})
AfterEach(func() {
Expect(db.Close()).NotTo(HaveOccurred())
})
Describe("sql.NullInt64", func() {
type Test struct {
Id int
Value sql.NullInt64
}
It("inserts null value", func() {
ins := Test{
Id: 1,
}
err := db.Insert(&ins)
Expect(err).NotTo(HaveOccurred())
sel := Test{
Id: 1,
}
err = db.Select(&sel)
Expect(err).NotTo(HaveOccurred())
Expect(sel.Value.Valid).To(BeFalse())
})
It("inserts non-null value", func() {
ins := Test{
Id: 1,
Value: sql.NullInt64{
Int64: 2,
Valid: true,
},
}
err := db.Insert(&ins)
Expect(err).NotTo(HaveOccurred())
sel := Test{
Id: 1,
}
err = db.Select(&sel)
Expect(err).NotTo(HaveOccurred())
Expect(sel.Value.Valid).To(BeTrue())
Expect(sel.Value.Int64).To(Equal(int64(2)))
})
})
Context("nil ptr", func() {
type Test struct {
Id int
Value *int
}
It("inserts null value", func() {
ins := Test{
Id: 1,
}
err := db.Insert(&ins)
Expect(err).NotTo(HaveOccurred())
sel := Test{
Id: 1,
}
err = db.Select(&sel)
Expect(err).NotTo(HaveOccurred())
Expect(sel.Value).To(BeNil())
})
It("inserts non-null value", func() {
value := 2
ins := Test{
Id: 1,
Value: &value,
}
err := db.Insert(&ins)
Expect(err).NotTo(HaveOccurred())
sel := Test{
Id: 1,
}
err = db.Select(&sel)
Expect(err).NotTo(HaveOccurred())
Expect(sel.Value).NotTo(BeNil())
Expect(*sel.Value).To(Equal(2))
})
})
})
var _ = Describe("DB.Select", func() {
var db *pg.DB
BeforeEach(func() {
db = pg.Connect(pgOptions())
})
AfterEach(func() {
Expect(db.Close()).NotTo(HaveOccurred())
})
It("selects bytea", func() {
qs := []string{
`CREATE TEMP TABLE tests (col bytea)`,
fmt.Sprintf(`INSERT INTO tests VALUES ('\x%x')`, []byte("bytes")),
}
for _, q := range qs {
_, err := db.Exec(q)
Expect(err).NotTo(HaveOccurred())
}
var col []byte
err := db.Model().Table("tests").Column("col").Select(pg.Scan(&col))
Expect(err).NotTo(HaveOccurred())
})
It("selects into embedded struct pointer", func() {
type One struct {
ID int
}
type Two struct {
*One
}
err := db.CreateTable((*Two)(nil), &orm.CreateTableOptions{
Temp: true,
})
Expect(err).NotTo(HaveOccurred())
err = db.Insert(&Two{
One: &One{
ID: 1,
},
})
Expect(err).NotTo(HaveOccurred())
two := new(Two)
err = db.Model(two).Where("id = 1").Select()
Expect(err).NotTo(HaveOccurred())
Expect(two.One.ID).To(Equal(1))
})
})
var _ = Describe("DB.Insert", func() {
var db *pg.DB
BeforeEach(func() {
db = pg.Connect(pgOptions())
})
AfterEach(func() {
Expect(db.Close()).NotTo(HaveOccurred())
})
It("returns an error on nil", func() {
err := db.Insert(nil)
Expect(err).To(MatchError("pg: Model(nil)"))
})
It("returns an error if value is not settable", func() {
err := db.Insert(1)
Expect(err).To(MatchError("pg: Model(non-pointer int)"))
})
It("returns an error if value is not supported", func() {
var v int
err := db.Insert(&v)
Expect(err).To(MatchError("pg: Model(unsupported int)"))
})
})
var _ = Describe("DB.Update", func() {
var db *pg.DB
BeforeEach(func() {
db = pg.Connect(pgOptions())
})
AfterEach(func() {
Expect(db.Close()).NotTo(HaveOccurred())
})
It("returns an error on nil", func() {
err := db.Update(nil)
Expect(err).To(MatchError("pg: Model(nil)"))
})
It("returns an error if there are no pks", func() {
type Test struct{}
var test Test
err := db.Update(&test)
Expect(err).To(MatchError(`pg: model=Test does not have primary keys`))
})
})
var _ = Describe("DB.Delete", func() {
var db *pg.DB
BeforeEach(func() {
db = pg.Connect(pgOptions())
})
AfterEach(func() {
Expect(db.Close()).NotTo(HaveOccurred())
})
It("returns an error on nil", func() {
err := db.Delete(nil)
Expect(err).To(MatchError("pg: Model(nil)"))
})
It("returns an error if there are no pks", func() {
type Test struct{}
var test Test
err := db.Delete(&test)
Expect(err).To(MatchError(`pg: model=Test does not have primary keys`))
})
It("returns an error if there are no where", func() {
var test []struct {
Id int
}
_, err := db.Model(&test).Delete()
Expect(err).To(MatchError(`pg: Update and Delete queries require Where clause (try WherePK)`))
})
})
var _ = Describe("errors", func() {
var db *pg.DB
BeforeEach(func() {
db = pg.Connect(pgOptions())
})
AfterEach(func() {
Expect(db.Close()).NotTo(HaveOccurred())
})
It("unknown column error", func() {
type Test struct {
Col1 int
}
var test Test
_, err := db.QueryOne(&test, "SELECT 1 AS col1, 2 AS col2")
Expect(err).To(MatchError("pg: can't find column=col2 in model=Test (try discard_unknown_columns)"))
Expect(test.Col1).To(Equal(1))
})
It("Scan error", func() {
var n1 int
_, err := db.QueryOne(pg.Scan(&n1), "SELECT 1, 2")
Expect(err).To(MatchError(`pg: no Scan var for column index=1 name="?column?"`))
Expect(n1).To(Equal(1))
})
})
type Genre struct {
// tableName is an optional field that specifies custom table name and alias.
// By default go-pg generates table name and alias from struct name.
tableName struct{} `sql:"genres,alias:genre"` // default values are the same
Id int // Id is automatically detected as primary key
Name string
Rating int `sql:"-"` // - is used to ignore field
Books []Book `pg:"many2many:book_genres"` // many to many relation
ParentId int
Subgenres []Genre `pg:"fk:parent_id"`
}
func (g Genre) String() string {
return fmt.Sprintf("Genre<Id=%d Name=%q>", g.Id, g.Name)
}
type Image struct {
Id int
Path string
}
type Author struct {
ID int // both "Id" and "ID" are detected as primary key
Name string `sql:",unique"`
Books []*Book // has many relation
AvatarId int
Avatar Image
}
func (a Author) String() string {
return fmt.Sprintf("Author<ID=%d Name=%q>", a.ID, a.Name)
}
type BookGenre struct {
tableName struct{} `sql:"alias:bg"` // custom table alias
BookId int `sql:",pk"` // pk tag is used to mark field as primary key
Book *Book
GenreId int `sql:",pk"`
Genre *Genre
Genre_Rating int // belongs to and is copied to Genre model
}
type Book struct {
Id int
Title string
AuthorID int
Author Author // has one relation
EditorID int
Editor *Author // has one relation
CreatedAt time.Time `sql:"default:now()"`
UpdatedAt time.Time
Genres []Genre `pg:"many2many:book_genres"` // many to many relation
Translations []Translation // has many relation
Comments []Comment `pg:"polymorphic:trackable_"` // has many polymorphic relation
}
var _ orm.BeforeInsertHook = (*Book)(nil)
func (b Book) String() string {
return fmt.Sprintf("Book<Id=%d Title=%q>", b.Id, b.Title)
}
func (b *Book) BeforeInsert(c context.Context) (context.Context, error) {
if b.CreatedAt.IsZero() {
b.CreatedAt = time.Now()
}
return c, nil
}
// BookWithCommentCount is like Book model, but has additional CommentCount
// field that is used to select data into it. The use of `pg:",inherit"` tag
// is essential here so it inherits internal model properties such as table name.
type BookWithCommentCount struct {
Book `pg:",inherit"`
CommentCount int
}
type Translation struct {
tableName struct{} `sql:",alias:tr"` // custom table alias
Id int
BookId int `sql:"unique:book_id_lang"`
Book *Book // has one relation
Lang string `sql:"unique:book_id_lang"`
Comments []Comment `pg:",polymorphic:trackable_"` // has many polymorphic relation
}
type Comment struct {
TrackableId int // Book.Id or Translation.Id
TrackableType string // "Book" or "Translation"
Text string