feat: upgrade dependencies

.golangci.yml

@@ -0,0 +1,44 @@
+# https://golangci-lint.run/usage/configuration/#config-file
+
+run:
+  timeout: 2m
+
+
+linters:
+  disable-all: true
+  enable:
+    - bodyclose
+    - deadcode
+    - depguard
+    - dogsled
+    - errcheck
+    - gocritic
+    - gocyclo
+    - gofmt
+    - goimports
+    # - golint
+    - goprintffuncname
+    - gosimple
+    - govet
+    - ineffassign
+    - interfacer
+    - nakedret
+    - noctx
+    - nolintlint
+    - rowserrcheck
+    - scopelint
+    - staticcheck
+    - structcheck
+    - stylecheck
+    - typecheck
+    - unconvert
+    - unparam
+    - unused
+    - varcheck
+    - whitespace
+
+
+linters-settings:
+  govet:
+    disable:
+      - printf

Makefile

@@ -1,4 +1,9 @@
-.PHONY: lint
+ALL: lint run
 
+.PHONY: lint
 lint:
-	gometalinter ./...
+	golangci-lint run
+
+.PHONY: run
+run:
+	go run example/main.go

cache/cache.go

@@ -7,7 +7,7 @@ import (
 )
 
 var (
-	ErrNil        = redis.Nil
+	ErrNil        = redis.Nil // error not found
 	DefaultCacher = NewMemoryCacher()
 )
 

cache/memory.go

@@ -4,6 +4,7 @@ import (
 	"time"
 
 	"github.com/gxxgle/go-utils/json"
+
 	"github.com/patrickmn/go-cache"
 )
 

cache/redis.go

@@ -3,9 +3,10 @@ package cache
 import (
 	"time"
 
-	"github.com/go-redis/redis/v7"
 	"github.com/gxxgle/go-utils/json"
 	"github.com/gxxgle/go-utils/log"
+
+	"github.com/go-redis/redis/v7"
 )
 
 // RedisConfig is config struct of redis.

db/db.go

@@ -5,43 +5,48 @@ import (
 	"strings"
 	"time"
 
+	"github.com/gxxgle/go-utils/env"
+	"github.com/gxxgle/go-utils/log"
+
 	"github.com/doug-martin/goqu/v9"
 	_ "github.com/doug-martin/goqu/v9/dialect/mysql"
 	_ "github.com/go-sql-driver/mysql"
-	"github.com/gxxgle/go-utils/env"
-	"github.com/gxxgle/go-utils/log"
-	"xorm.io/builder"
 	"xorm.io/xorm"
 )
 
+type Driver = string
+
+const (
+	MySQL Driver = "mysql"
+)
+
 // default config
 var (
 	DefaultRetries    = 5
 	DefaullRetrySleep = time.Second
 	DefaultNeedRetry  = isDeadlock
-	Builder           func() *builder.Builder
-	Goqu              goqu.DialectWrapper
+)
+
+var (
+	Goqu goqu.DialectWrapper
 )
 
 // Config for db
 type Config struct {
-	Driver   string `json:"driver"`
-	URL      string `json:"url"`
+	Driver   Driver `json:"driver"`
+	URL      string `json:"url"` // example: "root:PASSWORD@tcp(127.0.0.1:3306)/dbname?charset=utf8mb4&clientFoundRows=true&parseTime=true&loc=Asia%2FShanghai"
 	PoolSize int    `json:"pool_size"`
 	Debug    bool   `json:"debug"`
 }
 
 func OpenDB(cfg *Config) (*xorm.Engine, error) {
 	if cfg.Driver == "" {
-		cfg.Driver = builder.MYSQL
+		cfg.Driver = MySQL
 	}
 
 	switch cfg.Driver {
-	case builder.MYSQL:
-		Builder = builder.MySQL
-		Goqu = goqu.Dialect(builder.MYSQL)
-	// case builder.POSTGRES:
-	// 	Builder = builder.Postgres
+	case MySQL:
+		Goqu = goqu.Dialect(MySQL)
 	default:
 		return nil, fmt.Errorf("db driver: %s not support", cfg.Driver)
 	}
@@ -53,10 +58,13 @@ func OpenDB(cfg *Config) (*xorm.Engine, error) {
 
 	db.DatabaseTZ = env.Local
 	db.ShowSQL(cfg.Debug)
-	db.SetMaxOpenConns(cfg.PoolSize)
-	db.SetMaxIdleConns(cfg.PoolSize)
 	db.SetConnMaxLifetime(time.Minute * 30)
 
+	if cfg.PoolSize > 0 {
+		db.SetMaxOpenConns(cfg.PoolSize)
+		db.SetMaxIdleConns(cfg.PoolSize)
+	}
+
 	if err := db.Ping(); err != nil {
 		return nil, err
 	}

go.mod

@@ -20,7 +20,8 @@ require (
 	github.com/k0kubun/colorstring v0.0.0-20150214042306-9440f1994b88 // indirect
 	github.com/kataras/iris/v12 v12.1.8
 	github.com/klauspost/compress v1.10.10 // indirect
-	github.com/kr/pretty v0.2.0 // indirect
+	github.com/kr/pretty v0.2.1 // indirect
+	github.com/kr/text v0.2.0 // indirect
 	github.com/lib/pq v1.8.0 // indirect
 	github.com/mattn/go-colorable v0.1.7 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
@@ -45,6 +46,5 @@ require (
 	golang.org/x/crypto v0.0.0-20200709230013-948cd5f35899 // indirect
 	golang.org/x/net v0.0.0-20200707034311-ab3426394381
 	gopkg.in/yaml.v2 v2.3.0 // indirect
-	xorm.io/builder v0.3.7
 	xorm.io/xorm v1.0.3
 )

go.sum

@@ -30,10 +30,10 @@ github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc
 github.com/coreos/go-etcd v2.0.0+incompatible/go.mod h1:Jez6KQU2B/sWsbdaef3ED8NzMklzPG4d5KIOhIy30Tk=
 github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
 github.com/cpuguy83/go-md2man v1.0.10/go.mod h1:SmD6nW6nTyfqj6ABTjUi3V3JVMnlJmwcJI5acqYI6dE=
+github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/denisenkom/go-mssqldb v0.0.0-20200206145737-bbfc9a55622e h1:LzwWXEScfcTu7vUZNlDDWDARoSGEtvlDKK2BYHowNeE=
 github.com/denisenkom/go-mssqldb v0.0.0-20200206145737-bbfc9a55622e/go.mod h1:xbL0rPBG9cCiLr28tMa8zpbdarY27NDyej4t/EjAShU=
 github.com/denisenkom/go-mssqldb v0.0.0-20200428022330-06a60b6afbbc/go.mod h1:xbL0rPBG9cCiLr28tMa8zpbdarY27NDyej4t/EjAShU=
 github.com/dgraph-io/badger v1.6.0/go.mod h1:zwt7syl517jmP8s94KqSxTlM6IMsdhYy6psNgSztDR4=
@@ -56,7 +56,6 @@ github.com/globalsign/mgo v0.0.0-20181015135952-eeefdecb41b8 h1:DujepqpGd1hyOd7a
 github.com/globalsign/mgo v0.0.0-20181015135952-eeefdecb41b8/go.mod h1:xkRDCp4j0OGD1HRkm4kmhM+pmpv3AKq5SU7GMg4oO/Q=
 github.com/go-check/check v0.0.0-20180628173108-788fd7840127 h1:0gkP6mzaMqkmpcJYCFOLkIBwI7xFExG03bbkOkCvUPI=
 github.com/go-check/check v0.0.0-20180628173108-788fd7840127/go.mod h1:9ES+weclKsC9YodN5RgxqK/VD9HM9JsCSh7rNhMZE98=
-github.com/go-redis/redis/v7 v7.2.0 h1:CrCexy/jYWZjW0AyVoHlcJUeZN19VWlbepTh1Vq6dJs=
 github.com/go-redis/redis/v7 v7.2.0/go.mod h1:JDNMw23GTyLNC4GZu9njt15ctBQVn7xjRfnwdHj/Dcg=
 github.com/go-redis/redis/v7 v7.4.0 h1:7obg6wUoj05T0EpY0o8B59S9w5yeMWql7sw2kwNW1x4=
 github.com/go-redis/redis/v7 v7.4.0/go.mod h1:JDNMw23GTyLNC4GZu9njt15ctBQVn7xjRfnwdHj/Dcg=
@@ -66,7 +65,6 @@ github.com/go-sql-driver/mysql v1.5.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LB
 github.com/gobwas/httphead v0.0.0-20180130184737-2c6c146eadee/go.mod h1:L0fX3K22YWvt/FAX9NnzrNzcI4wNYi9Yku4O0LKYflo=
 github.com/gobwas/pool v0.2.0/go.mod h1:q8bcK0KcYlCgd9e7WYLm9LpyS+YeLd8JVDW6WezmKEw=
 github.com/gobwas/ws v1.0.2/go.mod h1:szmBTxLgaFppYjEmNtny/v3w89xOydFnnZMcgRRu/EM=
-github.com/golang-sql/civil v0.0.0-20190719163853-cb61b32ac6fe h1:lXe2qZdvpiX5WZkZR4hgp4KJVfY3nMkvmwbVkpv1rVY=
 github.com/golang-sql/civil v0.0.0-20190719163853-cb61b32ac6fe/go.mod h1:8vg3r2VgvsThLBIFL93Qb5yWzgyZWhEmBwUJWevAkK0=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
@@ -111,7 +109,6 @@ github.com/iris-contrib/pongo2 v0.0.1 h1:zGP7pW51oi5eQZMIlGA3I+FHY9/HOQWDB+572yi
 github.com/iris-contrib/pongo2 v0.0.1/go.mod h1:Ssh+00+3GAZqSQb30AvBRNxBx7rf0GqwkjqxNd0u65g=
 github.com/iris-contrib/schema v0.0.1 h1:10g/WnoRR+U+XXHWKBHeNy/+tZmM2kcAVGLOsz+yaDA=
 github.com/iris-contrib/schema v0.0.1/go.mod h1:urYA3uvUNG1TIIjOSCzHr9/LmbQo8LrOcOqfqxa4hXw=
-github.com/json-iterator/go v1.1.9 h1:9yzud/Ht36ygwatGx56VwCZtlI/2AD15T1X2sjSuGns=
 github.com/json-iterator/go v1.1.9/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
 github.com/json-iterator/go v1.1.10 h1:Kz6Cvnvv2wGdaG/V8yMvfkmNiXq9Ya2KUv4rouJJr68=
 github.com/json-iterator/go v1.1.10/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
@@ -128,20 +125,19 @@ github.com/kataras/pio v0.0.2 h1:6NAi+uPJ/Zuid6mrAKlgpbI11/zK/lV4B2rxWaJN98Y=
 github.com/kataras/pio v0.0.2/go.mod h1:hAoW0t9UmXi4R5Oyq5Z4irTbaTsOemSrDGUtaTl7Dro=
 github.com/kataras/sitemap v0.0.5 h1:4HCONX5RLgVy6G4RkYOV3vKNcma9p236LdGOipJsaFE=
 github.com/kataras/sitemap v0.0.5/go.mod h1:KY2eugMKiPwsJgx7+U103YZehfvNGOXURubcGyk0Bz8=
-github.com/klauspost/compress v1.9.7 h1:hYW1gP94JUmAhBtJ+LNz5My+gBobDxPR1iVuKug26aA=
 github.com/klauspost/compress v1.9.7/go.mod h1:RyIbtBH6LamlWaDj8nUwkbUhJ87Yi3uG0guNDohfE1A=
-github.com/klauspost/compress v1.10.7 h1:7rix8v8GpI3ZBb0nSozFRgbtXKv+hOe+qfEpZqybrAg=
 github.com/klauspost/compress v1.10.7/go.mod h1:aoV0uJVorq1K+umq18yTdKaF57EivdYsUV+/s2qKfXs=
 github.com/klauspost/compress v1.10.10 h1:a/y8CglcM7gLGYmlbP/stPE5sR3hbhFRUjCBfd/0B3I=
 github.com/klauspost/compress v1.10.10/go.mod h1:aoV0uJVorq1K+umq18yTdKaF57EivdYsUV+/s2qKfXs=
 github.com/konsorten/go-windows-terminal-sequences v1.0.3 h1:CE8S1cTafDpPvMhIxNJKvHsGVBgn1xWYf1NbHQhywc8=
 github.com/konsorten/go-windows-terminal-sequences v1.0.3/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
-github.com/kr/pretty v0.2.0 h1:s5hAObm+yFO5uHYt5dYjxi2rXrsnmRpJx4OYvIWUaQs=
-github.com/kr/pretty v0.2.0/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
+github.com/kr/pretty v0.2.1 h1:Fmg33tUaq4/8ym9TJN1x7sLJnHVwhP33CNkpYV/7rwI=
+github.com/kr/pretty v0.2.1/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
-github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
+github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/lib/pq v1.2.0/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
 github.com/lib/pq v1.7.0/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
 github.com/lib/pq v1.8.0 h1:9xohqzkUwzR4Ga4ivdTcawVS89YSDVxXMa3xJX3cGzg=
@@ -151,7 +147,6 @@ github.com/mattn/go-colorable v0.1.7 h1:bQGKb3vps/j0E9GfJQ03JyhRuxsvdAanXlT9BTw3
 github.com/mattn/go-colorable v0.1.7/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
 github.com/mattn/go-isatty v0.0.12 h1:wuysRhFDzyxgEmMf5xjvJ2M9dZoWAXNNr5LSBS7uHXY=
 github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
-github.com/mattn/go-sqlite3 v1.11.0 h1:LDdKkqtYlom37fkvqs8rMPFKAMe8+SgjbwZ6ex1/A/Q=
 github.com/mattn/go-sqlite3 v1.11.0/go.mod h1:FPy6KqzDD04eiIsT53CuJW3U88zkxoIYsOqkbpncsNc=
 github.com/mattn/go-sqlite3 v1.14.0 h1:mLyGNKR8+Vv9CAU7PphKa2hkEqxxhn8i32J6FPj1/QA=
 github.com/mattn/go-sqlite3 v1.14.0/go.mod h1:JIl7NbARA7phWnGvh0LKTyg7S9BA+6gx71ShQilpsus=
@@ -183,7 +178,6 @@ github.com/onsi/gomega v1.7.0/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1Cpa
 github.com/patrickmn/go-cache v2.1.0+incompatible h1:HRMgzkcYKYpi3C8ajMPV8OFXaaRUnok+kx1WdO15EQc=
 github.com/patrickmn/go-cache v2.1.0+incompatible/go.mod h1:3Qf8kWWT7OJRJbdiICTKqZju1ZixQ/KpMGzzAfe6+WQ=
 github.com/pelletier/go-toml v1.2.0/go.mod h1:5z9KED0ma1S8pY6P1sdut58dfprrGBbd/94hg7ilaic=
-github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
@@ -250,7 +244,6 @@ github.com/yudai/golcs v0.0.0-20170316035057-ecda9a501e82 h1:BHyfKlQyqbsFN5p3Ifn
 github.com/yudai/golcs v0.0.0-20170316035057-ecda9a501e82/go.mod h1:lgjkn3NuSvDfVJdfcVVdX+jpBxNmX4rDAzaS45IcYoM=
 github.com/yudai/pp v2.0.1+incompatible h1:Q4//iY4pNF6yPLZIigmvcl7k/bPgrcTPIFIcmawg5bI=
 github.com/yudai/pp v2.0.1+incompatible/go.mod h1:PuxR/8QJ7cyCkFp/aUDS+JY727OFEZkTdatxwunjIkc=
-github.com/ziutek/mymysql v1.5.4 h1:GB0qdRGsTwQSBVYuVShFBKaXSnSnYYC2d9knnE1LHFs=
 github.com/ziutek/mymysql v1.5.4/go.mod h1:LMSpPZ6DbqWFxNCHW77HeMg9I646SAhApZ/wKdgO/C0=
 golang.org/x/crypto v0.0.0-20181203042331-505ab145d0a9/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
@@ -289,7 +282,6 @@ golang.org/x/sys v0.0.0-20190626221950-04f50cda93cb/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20191010194322-b09406accb47/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd h1:xhmwyvizuTgC2qz7ZlMluP20uW+C3Rm0FD/WLDX8884=
 golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200602225109-6fdc65e7d980 h1:OjiUf46hAmXblsZdnoSXsEUSKU8r1UEzcL5RVZ4gO9Y=
 golang.org/x/sys v0.0.0-20200602225109-6fdc65e7d980/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=

iriser/example/main.go

@@ -4,21 +4,23 @@ import (
 	"errors"
 
 	"github.com/gxxgle/go-utils/iriser"
+	"github.com/gxxgle/go-utils/log"
+
 	"github.com/kataras/iris/v12"
 	"github.com/kataras/iris/v12/middleware/recover"
 )
 
 type defaultHandler struct{}
 
 func (*defaultHandler) HelloPanic(ctx iris.Context) {
-	ctx.JSON(iris.Map{
+	_, _ = ctx.JSON(iris.Map{
 		"name": "world",
 	})
 	panic(errors.New("custom panic"))
 }
 
 func (*defaultHandler) Hello(ctx iris.Context) {
-	ctx.JSON(iris.Map{
+	_, _ = ctx.JSON(iris.Map{
 		"name": "world",
 	})
 }
@@ -27,9 +29,9 @@ func main() {
 	app := iris.New()
 	app.Logger().SetLevel("debug")
 	app.Use(recover.New())
-	app.Use(iriser.NewLogger())
+	app.Use(iriser.NewLogger(nil))
 
 	iriser.Register(app.Party("/v1"), new(defaultHandler))
 
-	app.Run(iris.Addr(":8080"), iris.WithoutServerError(iris.ErrServerClosed))
+	log.LogIfError(app.Run(iris.Addr(":8080"), iris.WithoutServerError(iris.ErrServerClosed)))
 }

iriser/iriser.go

@@ -6,6 +6,7 @@ import (
 	"time"
 
 	"github.com/gxxgle/go-utils/log"
+
 	"github.com/kataras/iris/v12"
 	"github.com/kataras/iris/v12/core/router"
 	"github.com/kataras/iris/v12/middleware/logger"

json/json.go

@@ -3,7 +3,7 @@ package json
 import (
 	stdjson "encoding/json"
 
-	"github.com/json-iterator/go"
+	jsoniter "github.com/json-iterator/go"
 	"github.com/tidwall/gjson"
 )
 

log/log.go

@@ -8,6 +8,7 @@ import (
 	"strings"
 
 	"github.com/gxxgle/go-utils/path"
+
 	"github.com/sirupsen/logrus"
 )
 
@@ -83,6 +84,14 @@ func Debug() {
 	logrus.SetLevel(logrus.DebugLevel)
 }
 
+func LogIfError(err error, msg ...interface{}) {
+	if err == nil {
+		return
+	}
+
+	L.WithError(err).Error(msg...)
+}
+
 func Close() {
 	if logfile != nil {
 		logfile.Close()

math/logarithm.go

@@ -13,7 +13,7 @@ func Log(args ...float64) float64 {
 		step    = float64(1)
 	)
 
-	if len(args) <= 0 {
+	if len(args) == 0 {
 		return 0
 	}
 

math/math.go

@@ -53,6 +53,6 @@ func FloatToInt(f float64, precision int32) int {
 func FloatFromInt(i int, precision int32) float64 {
 	dMulti := decimal.NewFromFloat(math.Pow10(int(precision)))
 	dI := decimal.NewFromFloat(float64(i))
-	out, _ := dI.Div(dMulti).Round(int32(precision)).Float64()
+	out, _ := dI.Div(dMulti).Round(precision).Float64()
 	return out
 }

mongo/mongo.go

@@ -66,7 +66,7 @@ func (s *Session) C(table interface{}) *mgo.Collection {
 
 // Insert inserts one or more documents in the respective collection
 func (s *Session) Insert(docs ...interface{}) error {
-	if len(docs) <= 0 {
+	if len(docs) == 0 {
 		return nil
 	}