protoc-gen-go-sqlmap:

This is a protobuf-plugin to generate SQL-Select mappers in go to insert, update and query protbuf messages directly from tables or views.

Usage:

Install with:

go install github.com/roderm/protoc-gen-go-sqlmap

protoc

protoc --go-sqlmap_out=. [your-protobuf-definition].proto

buf

• add dependency buf.build/roderm/protoc-gen-go-sqlmap
• add go-sqlmap and go to your buf.gen.yaml

To make use of this plugin, add following extensions to you .proto-file:

import "github.com/roderm/protoc-gen-go-sqlmap/proto/sqlgen/sqlgen.proto" // Import of the extensions
// or with buf
import "proto/sqlgen/sqlgen.proto"

message Some {
    option (sqlgen.table) = {name:"tbl_some", crud:[R]}; // table name and generate read-function
    string Id = 1 [(sqlgen.col) = {pk: AUTO, name = "some_id" }]; // It's an autogenerated key in the field "some_id"
    repeated Attribute Attributes = 2; [(sqlgeb.col) = {name "some_id",fk = "tbl_some_attributes.some_id"}]; // Make a one-to-many link to load
}

message Attribute {
    option (sqlgen.table) = {name:"tbl_some_attributes", crud:[C,R,D]}; // genereate insert,select and delete function
    string Id = 1 [(sqlgen.col) = {pk= AUTO, name = "attributes_id" }];
    string Name = 2 [(sqlgeb.col).name = "attributes_name"];
    bytes Value = 3 [(sqlgeb.col).name = "attributes_value"];
    Some Parent = 4 [(sqlgeb.col) = {name: "some_id", fk = "tbl_some.some_id"}]; // Make a one-to-one link to load
}

After generation of the .sqlmap.go-file you should be able to load the data as following:

store = package.NewStore(db_conn)
rows, err = store.Some(context.TODO(), package.SomeWithAttributes())

Additional there can be given extra parameters for filtering (Currently only forks for Postgres/Cockroach): store.Some(context.TODO(), SomeFilter(pg.EQ("some_id", "some_id")) or for the sub-query: store.Some(context.TODO(), package.SomeWithAttributes(AttributeFilter(pg.EQ("name", "FirstArgument")))

Docs

Roadmap:

• [-] Queries
  • loading of one-to-many
  • loading of one-to-one
  • add parameter to not resolve references (problem with json-encoding)
• [-] Insert
  • Insert single message to table
  • resolve foreign-key (and create)
• Delete
  • delete a data-row
• Implement update
  • Should have use replace and conflict handling parameter
• Decouple gogo
• Write generator test
• Support multiple PKs
• Add multiple FKs for single Message
• Support oneOf type in proto3
• Improve filter to no use column-names
• Load external messages to resolve foreign keys
• Implement more Database-Engines & syntax's
  • CockroachDB
  • PostgreSQL
  • MySQL / MariaDB
  • MSSQL
  • SQLite