From 84d2482ddbff9564c9ad75b2d30af66e3ddfd44d Mon Sep 17 00:00:00 2001 From: Christopher Speller Date: Thu, 12 May 2016 15:08:58 -0400 Subject: Updating go depencancies. Switching to go1.6 vendoring (#2949) --- vendor/github.com/go-gorp/gorp/gorp.go | 558 +++++++++++++++++++++++++++++++++ 1 file changed, 558 insertions(+) create mode 100644 vendor/github.com/go-gorp/gorp/gorp.go (limited to 'vendor/github.com/go-gorp/gorp/gorp.go') diff --git a/vendor/github.com/go-gorp/gorp/gorp.go b/vendor/github.com/go-gorp/gorp/gorp.go new file mode 100644 index 000000000..1f32283f5 --- /dev/null +++ b/vendor/github.com/go-gorp/gorp/gorp.go @@ -0,0 +1,558 @@ +// Copyright 2012 James Cooper. All rights reserved. +// Use of this source code is governed by a MIT-style +// license that can be found in the LICENSE file. + +// Package gorp provides a simple way to marshal Go structs to and from +// SQL databases. It uses the database/sql package, and should work with any +// compliant database/sql driver. +// +// Source code and project home: +// https://github.com/go-gorp/gorp +// +package gorp + +import ( + "database/sql" + "database/sql/driver" + "fmt" + "reflect" + "regexp" + "strings" + "time" +) + +// OracleString (empty string is null) +// TODO: move to dialect/oracle?, rename to String? +type OracleString struct { + sql.NullString +} + +// Scan implements the Scanner interface. +func (os *OracleString) Scan(value interface{}) error { + if value == nil { + os.String, os.Valid = "", false + return nil + } + os.Valid = true + return os.NullString.Scan(value) +} + +// Value implements the driver Valuer interface. +func (os OracleString) Value() (driver.Value, error) { + if !os.Valid || os.String == "" { + return nil, nil + } + return os.String, nil +} + +// SqlTyper is a type that returns its database type. Most of the +// time, the type can just use "database/sql/driver".Valuer; but when +// it returns nil for its empty value, it needs to implement SqlTyper +// to have its column type detected properly during table creation. +type SqlTyper interface { + SqlType() driver.Valuer +} + +// for fields that exists in DB table, but not exists in struct +type dummyField struct{} + +// Scan implements the Scanner interface. +func (nt *dummyField) Scan(value interface{}) error { + return nil +} + +var zeroVal reflect.Value +var versFieldConst = "[gorp_ver_field]" + +// The TypeConverter interface provides a way to map a value of one +// type to another type when persisting to, or loading from, a database. +// +// Example use cases: Implement type converter to convert bool types to "y"/"n" strings, +// or serialize a struct member as a JSON blob. +type TypeConverter interface { + // ToDb converts val to another type. Called before INSERT/UPDATE operations + ToDb(val interface{}) (interface{}, error) + + // FromDb returns a CustomScanner appropriate for this type. This will be used + // to hold values returned from SELECT queries. + // + // In particular the CustomScanner returned should implement a Binder + // function appropriate for the Go type you wish to convert the db value to + // + // If bool==false, then no custom scanner will be used for this field. + FromDb(target interface{}) (CustomScanner, bool) +} + +// Executor exposes the sql.DB and sql.Tx Exec function so that it can be used +// on internal functions that convert named parameters for the Exec function. +type executor interface { + Exec(query string, args ...interface{}) (sql.Result, error) +} + +// SqlExecutor exposes gorp operations that can be run from Pre/Post +// hooks. This hides whether the current operation that triggered the +// hook is in a transaction. +// +// See the DbMap function docs for each of the functions below for more +// information. +type SqlExecutor interface { + Get(i interface{}, keys ...interface{}) (interface{}, error) + Insert(list ...interface{}) error + Update(list ...interface{}) (int64, error) + Delete(list ...interface{}) (int64, error) + Exec(query string, args ...interface{}) (sql.Result, error) + Select(i interface{}, query string, + args ...interface{}) ([]interface{}, error) + SelectInt(query string, args ...interface{}) (int64, error) + SelectNullInt(query string, args ...interface{}) (sql.NullInt64, error) + SelectFloat(query string, args ...interface{}) (float64, error) + SelectNullFloat(query string, args ...interface{}) (sql.NullFloat64, error) + SelectStr(query string, args ...interface{}) (string, error) + SelectNullStr(query string, args ...interface{}) (sql.NullString, error) + SelectOne(holder interface{}, query string, args ...interface{}) error + query(query string, args ...interface{}) (*sql.Rows, error) + queryRow(query string, args ...interface{}) *sql.Row +} + +// Compile-time check that DbMap and Transaction implement the SqlExecutor +// interface. +var _, _ SqlExecutor = &DbMap{}, &Transaction{} + +func argsString(args ...interface{}) string { + var margs string + for i, a := range args { + var v interface{} = a + if x, ok := v.(driver.Valuer); ok { + y, err := x.Value() + if err == nil { + v = y + } + } + switch v.(type) { + case string: + v = fmt.Sprintf("%q", v) + default: + v = fmt.Sprintf("%v", v) + } + margs += fmt.Sprintf("%d:%s", i+1, v) + if i+1 < len(args) { + margs += " " + } + } + return margs +} + +// Calls the Exec function on the executor, but attempts to expand any eligible named +// query arguments first. +func exec(e SqlExecutor, query string, args ...interface{}) (sql.Result, error) { + var dbMap *DbMap + var executor executor + switch m := e.(type) { + case *DbMap: + executor = m.Db + dbMap = m + case *Transaction: + executor = m.tx + dbMap = m.dbmap + } + + if len(args) == 1 { + query, args = maybeExpandNamedQuery(dbMap, query, args) + } + + return executor.Exec(query, args...) +} + +// maybeExpandNamedQuery checks the given arg to see if it's eligible to be used +// as input to a named query. If so, it rewrites the query to use +// dialect-dependent bindvars and instantiates the corresponding slice of +// parameters by extracting data from the map / struct. +// If not, returns the input values unchanged. +func maybeExpandNamedQuery(m *DbMap, query string, args []interface{}) (string, []interface{}) { + var ( + arg = args[0] + argval = reflect.ValueOf(arg) + ) + if argval.Kind() == reflect.Ptr { + argval = argval.Elem() + } + + if argval.Kind() == reflect.Map && argval.Type().Key().Kind() == reflect.String { + return expandNamedQuery(m, query, func(key string) reflect.Value { + return argval.MapIndex(reflect.ValueOf(key)) + }) + } + if argval.Kind() != reflect.Struct { + return query, args + } + if _, ok := arg.(time.Time); ok { + // time.Time is driver.Value + return query, args + } + if _, ok := arg.(driver.Valuer); ok { + // driver.Valuer will be converted to driver.Value. + return query, args + } + + return expandNamedQuery(m, query, argval.FieldByName) +} + +var keyRegexp = regexp.MustCompile(`:[[:word:]]+`) + +// expandNamedQuery accepts a query with placeholders of the form ":key", and a +// single arg of Kind Struct or Map[string]. It returns the query with the +// dialect's placeholders, and a slice of args ready for positional insertion +// into the query. +func expandNamedQuery(m *DbMap, query string, keyGetter func(key string) reflect.Value) (string, []interface{}) { + var ( + n int + args []interface{} + ) + return keyRegexp.ReplaceAllStringFunc(query, func(key string) string { + val := keyGetter(key[1:]) + if !val.IsValid() { + return key + } + args = append(args, val.Interface()) + newVar := m.Dialect.BindVar(n) + n++ + return newVar + }), args +} + +func columnToFieldIndex(m *DbMap, t reflect.Type, cols []string) ([][]int, error) { + colToFieldIndex := make([][]int, len(cols)) + + // check if type t is a mapped table - if so we'll + // check the table for column aliasing below + tableMapped := false + table := tableOrNil(m, t) + if table != nil { + tableMapped = true + } + + // Loop over column names and find field in i to bind to + // based on column name. all returned columns must match + // a field in the i struct + missingColNames := []string{} + for x := range cols { + colName := strings.ToLower(cols[x]) + field, found := t.FieldByNameFunc(func(fieldName string) bool { + field, _ := t.FieldByName(fieldName) + cArguments := strings.Split(field.Tag.Get("db"), ",") + fieldName = cArguments[0] + + if fieldName == "-" { + return false + } else if fieldName == "" { + fieldName = field.Name + } + if tableMapped { + colMap := colMapOrNil(table, fieldName) + if colMap != nil { + fieldName = colMap.ColumnName + } + } + return colName == strings.ToLower(fieldName) + }) + if found { + colToFieldIndex[x] = field.Index + } + if colToFieldIndex[x] == nil { + missingColNames = append(missingColNames, colName) + } + } + if len(missingColNames) > 0 { + return colToFieldIndex, &NoFieldInTypeError{ + TypeName: t.Name(), + MissingColNames: missingColNames, + } + } + return colToFieldIndex, nil +} + +func fieldByName(val reflect.Value, fieldName string) *reflect.Value { + // try to find field by exact match + f := val.FieldByName(fieldName) + + if f != zeroVal { + return &f + } + + // try to find by case insensitive match - only the Postgres driver + // seems to require this - in the case where columns are aliased in the sql + fieldNameL := strings.ToLower(fieldName) + fieldCount := val.NumField() + t := val.Type() + for i := 0; i < fieldCount; i++ { + sf := t.Field(i) + if strings.ToLower(sf.Name) == fieldNameL { + f := val.Field(i) + return &f + } + } + + return nil +} + +// toSliceType returns the element type of the given object, if the object is a +// "*[]*Element" or "*[]Element". If not, returns nil. +// err is returned if the user was trying to pass a pointer-to-slice but failed. +func toSliceType(i interface{}) (reflect.Type, error) { + t := reflect.TypeOf(i) + if t.Kind() != reflect.Ptr { + // If it's a slice, return a more helpful error message + if t.Kind() == reflect.Slice { + return nil, fmt.Errorf("gorp: cannot SELECT into a non-pointer slice: %v", t) + } + return nil, nil + } + if t = t.Elem(); t.Kind() != reflect.Slice { + return nil, nil + } + return t.Elem(), nil +} + +func toType(i interface{}) (reflect.Type, error) { + t := reflect.TypeOf(i) + + // If a Pointer to a type, follow + for t.Kind() == reflect.Ptr { + t = t.Elem() + } + + if t.Kind() != reflect.Struct { + return nil, fmt.Errorf("gorp: cannot SELECT into this type: %v", reflect.TypeOf(i)) + } + return t, nil +} + +func get(m *DbMap, exec SqlExecutor, i interface{}, + keys ...interface{}) (interface{}, error) { + + t, err := toType(i) + if err != nil { + return nil, err + } + + table, err := m.TableFor(t, true) + if err != nil { + return nil, err + } + + plan := table.bindGet() + + v := reflect.New(t) + dest := make([]interface{}, len(plan.argFields)) + + conv := m.TypeConverter + custScan := make([]CustomScanner, 0) + + for x, fieldName := range plan.argFields { + f := v.Elem().FieldByName(fieldName) + target := f.Addr().Interface() + if conv != nil { + scanner, ok := conv.FromDb(target) + if ok { + target = scanner.Holder + custScan = append(custScan, scanner) + } + } + dest[x] = target + } + + row := exec.queryRow(plan.query, keys...) + err = row.Scan(dest...) + if err != nil { + if err == sql.ErrNoRows { + err = nil + } + return nil, err + } + + for _, c := range custScan { + err = c.Bind() + if err != nil { + return nil, err + } + } + + if v, ok := v.Interface().(HasPostGet); ok { + err := v.PostGet(exec) + if err != nil { + return nil, err + } + } + + return v.Interface(), nil +} + +func delete(m *DbMap, exec SqlExecutor, list ...interface{}) (int64, error) { + count := int64(0) + for _, ptr := range list { + table, elem, err := m.tableForPointer(ptr, true) + if err != nil { + return -1, err + } + + eval := elem.Addr().Interface() + if v, ok := eval.(HasPreDelete); ok { + err = v.PreDelete(exec) + if err != nil { + return -1, err + } + } + + bi, err := table.bindDelete(elem) + if err != nil { + return -1, err + } + + res, err := exec.Exec(bi.query, bi.args...) + if err != nil { + return -1, err + } + rows, err := res.RowsAffected() + if err != nil { + return -1, err + } + + if rows == 0 && bi.existingVersion > 0 { + return lockError(m, exec, table.TableName, + bi.existingVersion, elem, bi.keys...) + } + + count += rows + + if v, ok := eval.(HasPostDelete); ok { + err := v.PostDelete(exec) + if err != nil { + return -1, err + } + } + } + + return count, nil +} + +func update(m *DbMap, exec SqlExecutor, colFilter ColumnFilter, list ...interface{}) (int64, error) { + count := int64(0) + for _, ptr := range list { + table, elem, err := m.tableForPointer(ptr, true) + if err != nil { + return -1, err + } + + eval := elem.Addr().Interface() + if v, ok := eval.(HasPreUpdate); ok { + err = v.PreUpdate(exec) + if err != nil { + return -1, err + } + } + + bi, err := table.bindUpdate(elem, colFilter) + if err != nil { + return -1, err + } + + res, err := exec.Exec(bi.query, bi.args...) + if err != nil { + return -1, err + } + + rows, err := res.RowsAffected() + if err != nil { + return -1, err + } + + if rows == 0 && bi.existingVersion > 0 { + return lockError(m, exec, table.TableName, + bi.existingVersion, elem, bi.keys...) + } + + if bi.versField != "" { + elem.FieldByName(bi.versField).SetInt(bi.existingVersion + 1) + } + + count += rows + + if v, ok := eval.(HasPostUpdate); ok { + err = v.PostUpdate(exec) + if err != nil { + return -1, err + } + } + } + return count, nil +} + +func insert(m *DbMap, exec SqlExecutor, list ...interface{}) error { + for _, ptr := range list { + table, elem, err := m.tableForPointer(ptr, false) + if err != nil { + return err + } + + eval := elem.Addr().Interface() + if v, ok := eval.(HasPreInsert); ok { + err := v.PreInsert(exec) + if err != nil { + return err + } + } + + bi, err := table.bindInsert(elem) + if err != nil { + return err + } + + if bi.autoIncrIdx > -1 { + f := elem.FieldByName(bi.autoIncrFieldName) + switch inserter := m.Dialect.(type) { + case IntegerAutoIncrInserter: + id, err := inserter.InsertAutoIncr(exec, bi.query, bi.args...) + if err != nil { + return err + } + k := f.Kind() + if (k == reflect.Int) || (k == reflect.Int16) || (k == reflect.Int32) || (k == reflect.Int64) { + f.SetInt(id) + } else if (k == reflect.Uint) || (k == reflect.Uint16) || (k == reflect.Uint32) || (k == reflect.Uint64) { + f.SetUint(uint64(id)) + } else { + return fmt.Errorf("gorp: cannot set autoincrement value on non-Int field. SQL=%s autoIncrIdx=%d autoIncrFieldName=%s", bi.query, bi.autoIncrIdx, bi.autoIncrFieldName) + } + case TargetedAutoIncrInserter: + err := inserter.InsertAutoIncrToTarget(exec, bi.query, f.Addr().Interface(), bi.args...) + if err != nil { + return err + } + case TargetQueryInserter: + var idQuery = table.ColMap(bi.autoIncrFieldName).GeneratedIdQuery + if idQuery == "" { + return fmt.Errorf("gorp: cannot set %s value if its ColumnMap.GeneratedIdQuery is empty", bi.autoIncrFieldName) + } + err := inserter.InsertQueryToTarget(exec, bi.query, idQuery, f.Addr().Interface(), bi.args...) + if err != nil { + return err + } + default: + return fmt.Errorf("gorp: cannot use autoincrement fields on dialects that do not implement an autoincrementing interface") + } + } else { + _, err := exec.Exec(bi.query, bi.args...) + if err != nil { + return err + } + } + + if v, ok := eval.(HasPostInsert); ok { + err := v.PostInsert(exec) + if err != nil { + return err + } + } + } + return nil +} -- cgit v1.2.3-1-g7c22