Question

我使用角度SDK在Postback中添加和编辑几何体，并且我有以下工作正常：

ProjectGeoms.upsert({"id":"129","projectGeom":   {"type":"Polygon","coordinates":[[arrays of x/y co-ordinates]],"crs":{"type":"name","properties":{"name":"EPSG:4326"}}}}, successCallback, errorCallback)

正在运行的SQL查询是：

loopback:connector:postgresql SQL: UPDATE "public"."project_geom" SET  "ref"=$1,"project_geom"=$2
Parameters: 129,{"type":"Polygon","coordinates":[[arrays of x/y co-ordinates]],"crs":{"type":"name","properties":{"name":"EPSG:4326"}}} +2ms

这适用于已存在的几何体。但是，当我为不存在的几何体添加它（相同的JSON结构，但ID为124）时，它就不起作用。

正在运行的SQL查询是：

loopback:connector:postgresql SQL: INSERT INTO "public"."project_geom" ("ref","project_geom") SELECT $1,$2 RETURNING 
Parameters: 124,{"type":"Polygon","coordinates":[[arrays of x/y co-ordinates]],"crs":{"type":"name","properties":{"name":"EPSG:4326"}}} +2ms

完整的错误消息如下：

loopback:connector:postgresql error: syntax error at end of input
at Connection.parseE (C:\Bitnami\wappstack-5.4.30-   0\apache2\htdocs\project\api\node_modules\loopback-connector-postgresql\node_modules\pg\lib\connection.js:534:11)
at Connection.parseMessage (C:\Bitnami\wappstack-5.4.30-0\apache2\htdocs\project\api\node_modules\loopback-connector-postgresql\node_modules\pg\lib\connection.js:361:17)
at Socket.<anonymous> (C:\Bitnami\wappstack-5.4.30-0\apache2\htdocs\project\api\node_modules\loopback-connector-postgresql\node_modules\pg\lib\connection.js:105:22)
at Socket.emit (events.js:95:17)
at Socket.<anonymous> (_stream_readable.js:765:14)
at Socket.emit (events.js:92:17)
at emitReadable_ (_stream_readable.js:427:10)
at emitReadable (_stream_readable.js:423:5)
at readableAddChunk (_stream_readable.js:166:9)
at Socket.Readable.push (_stream_readable.js:128:10) +15ms

如果我直接在Postgres中运行以下查询：

INSERT INTO project_geom (ref,project_geom) VALUES (124,'{"type":"Polygon","coordinates":[[arrays of x/y co-ordinates]],"crs":{"type":"name","properties":{"name":"EPSG:4326"}}}'::json);

我可以毫无问题地插入值。

表格数据架构为(ref::integer, project_geom::json)

Answer 1

RTFM案例 - 我错过了此页http://docs.strongloop.com/display/public/LB/Model+definition+JSON+file#ModeldefinitionJSONfile-IDproperties，其中明确指出

LoopBack CRUD methods expect the model to have an "id" property if the model is backed by a database.

咄。我的模型没有。查看loopback-postgresql-connector的code，它需要 ID字段来返回带有“RETURNING”子句的id。虽然这是由loopback记录的，但在我看来，这个特殊情况下的问题可以更加清晰，所以我打算提交一个补丁来更改详细的日志/错误消息。

将几何（JSON）插入loopbackjs模型

1 个答案: