hasura/graphql-engine

docs: document support for st_within or st_dwithin for polygons

Open

#3,015 创建于 2019年10月4日

在 GitHub 查看
 (3 评论) (0 反应) (0 负责人)TypeScript (31,371 star) (2,787 fork)batch import
a/data/postgresc/docshelp wanted

描述

I need to get the following query in PostgreSQL

SELECT count(*) 
FROM geo_locations
WHERE ST_DWithin(coordinates, 'POLYGON((58.44773280389084 -19.335937500000004, 56.17002298293205 -14.765625000000002, 55.7765730186677 4.218750000000001, 54.36775852406841 9.492187500000002, 52.26815737376817 9.843750000000002, 45.089035564831036 3.5156250000000004, 42.293564192170095 8.085937500000002, 40.979898069620155 7.382812500000001, 41.244772343082076 3.5156250000000004, 52.482780222078226 -14.765625000000002, 57.89149735271034 -20.390625000000004, 60.75915950226991 -21.796875000000004, 58.44773280389084 -19.335937500000004))', 100)

or

SELECT count(*) 
FROM geo_locations
WHERE ST_DWithin(coordinates, ST_GeomFromGeoJSON('{"type":"Polygon","coordinates":[[[58.44773280389084,-19.335937500000004],[56.17002298293205,-14.765625000000002],[55.7765730186677,4.218750000000001],[54.36775852406841,9.492187500000002],[52.26815737376817,9.843750000000002],[45.089035564831036,3.5156250000000004],[42.293564192170095,8.085937500000002],[40.979898069620155,7.382812500000001],[41.244772343082076,3.5156250000000004],[52.482780222078226,-14.765625000000002],[57.89149735271034,-20.390625000000004],[60.75915950226991,-21.796875000000004],[58.44773280389084,-19.335937500000004]]]}'), 100)

I'm trying to do it with

query ($polygon: st_d_within_input) {
  geo_locations(where: {coordinates: {_cast: {geometry: {_st_d_within: $polygon}}}}) {
    search_key
  }
}

but it fails with

{
  "errors": [
    {
      "extensions": {
        "path": "$.variableValues.polygon",
        "code": "validation-failed"
      },
      "message": "field distance of type Float! is required, but not found"
    }
  ]
}

贡献者指南

技术栈
postgresqlgraphql
领域
backendapidatabase
议题类型
documentation
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
2
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
1-3 hours
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
stale
清晰度议题是否清楚说明期望改动、验收标准和下一步。
mostly clear
前置要求
Basic knowledge of PostGISFamiliarity with Hasura GraphQL
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
65
研究方向
This issue requests documentation for using ST DWithin with polygon geometries in Hasura. Currently, the error suggests the input type requires a 'distance' field, indicating that st d within might only support point geometries. Investigate the Hasura documentation for spatial queries and confirm whether ST DWithin with polygons is supported. If not, document the limitation. Look at the Hasura graphql engine repository for any existing docs or code comments related to spatial filtering. Also, check if there are any related issues or PRs that address polygon support. Provide clear examples or a note in the documentation.
docs: document support for st_within or st_dwithin for polygons · hasura/graphql-engine#3015 | Good First Issue