graphql-index

graphql/.env.example

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+DB_URL=postgresql://[user]:[password]@[host]:[port]/[database]?sslmode=require

graphql/.gitignore

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+.env

graphql/README.md

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+# indexer-graphql
+
+## How to start
+
+### step 1
+
+copy the config example file,then replace the database information
+```cmd
+    cp .env.example .env
+```
+
+
+### step 2
+```cmd
+    go mod tidy
+```
+
+### step 3
+```cmd
+    go run server.go
+```
+
+then visit  http://localhost:8088/ for GraphQL playground
+
+
+

graphql/go.mod

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+module github.com/metaforo/indexer-graphql
+
+go 1.18
+
+require (
+	github.com/99designs/gqlgen v0.17.40
+	github.com/go-pg/pg/v10 v10.11.1
+	github.com/joho/godotenv v1.5.1
+	github.com/vektah/gqlparser/v2 v2.5.10
+)
+
+require (
+	github.com/agnivade/levenshtein v1.1.1 // indirect
+	github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
+	github.com/go-pg/zerochecker v0.2.0 // indirect
+	github.com/google/uuid v1.3.0 // indirect
+	github.com/gorilla/websocket v1.5.0 // indirect
+	github.com/hashicorp/golang-lru/v2 v2.0.3 // indirect
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/mitchellh/mapstructure v1.5.0 // indirect
+	github.com/russross/blackfriday/v2 v2.1.0 // indirect
+	github.com/sosodev/duration v1.1.0 // indirect
+	github.com/tmthrgd/go-hex v0.0.0-20190904060850-447a3041c3bc // indirect
+	github.com/urfave/cli/v2 v2.25.5 // indirect
+	github.com/vmihailenco/bufpool v0.1.11 // indirect
+	github.com/vmihailenco/msgpack/v5 v5.3.4 // indirect
+	github.com/vmihailenco/tagparser v0.1.2 // indirect
+	github.com/vmihailenco/tagparser/v2 v2.0.0 // indirect
+	github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect
+	golang.org/x/crypto v0.1.0 // indirect
+	golang.org/x/mod v0.10.0 // indirect
+	golang.org/x/sys v0.8.0 // indirect
+	golang.org/x/text v0.9.0 // indirect
+	golang.org/x/tools v0.9.3 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+	mellium.im/sasl v0.3.1 // indirect
+)

graphql/gqlgen.yml

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+# Where are all the schema files located? globs are supported eg  src/**/*.graphqls
+schema:
+  - graph/*.graphqls
+
+# Where should the generated server code go?
+exec:
+  filename: graph/generated.go
+  package: graph
+
+# Uncomment to enable federation
+# federation:
+#   filename: graph/federation.go
+#   package: graph
+
+# Where should any generated models go?
+model:
+  filename: graph/model/models_gen.go
+  package: model
+
+# Where should the resolver implementations go?
+resolver:
+  layout: follow-schema
+  dir: graph
+  package: graph
+  filename_template: "{name}.resolvers.go"
+  # Optional: turn on to not generate template comments above resolvers
+  # omit_template_comment: false
+
+# Optional: turn on use ` + "`" + `gqlgen:"fieldName"` + "`" + ` tags in your models
+# struct_tag: json
+
+# Optional: turn on to use []Thing instead of []*Thing
+# omit_slice_element_pointers: false
+
+# Optional: turn on to omit Is<Name>() methods to interface and unions
+# omit_interface_checks : true
+
+# Optional: turn on to skip generation of ComplexityRoot struct content and Complexity function
+# omit_complexity: false
+
+# Optional: turn on to not generate any file notice comments in generated files
+# omit_gqlgen_file_notice: false
+
+# Optional: turn on to exclude the gqlgen version in the generated file notice. No effect if `omit_gqlgen_file_notice` is true.
+# omit_gqlgen_version_in_file_notice: false
+
+# Optional: turn off to make struct-type struct fields not use pointers
+# e.g. type Thing struct { FieldA OtherThing } instead of { FieldA *OtherThing }
+# struct_fields_always_pointers: true
+
+# Optional: turn off to make resolvers return values instead of pointers for structs
+# resolvers_always_return_pointers: true
+
+# Optional: turn on to return pointers instead of values in unmarshalInput
+# return_pointers_in_unmarshalinput: false
+
+# Optional: wrap nullable input fields with Omittable
+# nullable_input_omittable: true
+
+# Optional: set to speed up generation time by not performing a final validation pass.
+# skip_validation: true
+
+# Optional: set to skip running `go mod tidy` when generating server code
+# skip_mod_tidy: true
+
+# gqlgen will search for any type names in the schema in these go packages
+# if they match it will use them, otherwise it will generate them.
+autobind:
+#  - "github.com/metaforo/indexer-graphql/graph/model"
+
+# This section declares type mapping between the GraphQL and go type systems
+#
+# The first line in each type will be used as defaults for resolver arguments and
+# modelgen, the others will be allowed when binding to fields. Configure them to
+# your liking
+models:
+  ID:
+    model:
+      - github.com/99designs/gqlgen/graphql.ID
+      - github.com/99designs/gqlgen/graphql.Int
+      - github.com/99designs/gqlgen/graphql.Int64
+      - github.com/99designs/gqlgen/graphql.Int32
+  Int:
+    model:
+      - github.com/99designs/gqlgen/graphql.Int
+      - github.com/99designs/gqlgen/graphql.Int64
+      - github.com/99designs/gqlgen/graphql.Int32

graphql/graph/db.go

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+package graph
+
+import (
+	"os"
+	"github.com/go-pg/pg/v10"
+)
+
+func Connect() *pg.DB {
+	connStr := os.Getenv("DB_URL")
+	opt, err := pg.ParseURL(connStr)
+	if err != nil {
+		panic(err)
+	}
+	db := pg.Connect(opt)
+	if _, DBStatus := db.Exec("SELECT 1"); DBStatus != nil {
+		panic(DBStatus)
+	}
+	return db
+}