Adding test case for data source opinionated query endpoint.

packages/server/src/api/controllers/datasource.js

@@ -68,10 +68,11 @@ exports.query = async function (ctx) {
   const datasourceId = queryJson.endpoint.datasourceId
   const database = new CouchDB(ctx.appId)
   const datasource = await database.get(datasourceId)
-  const source = integrations[datasource.source]
+  const Integration = integrations[datasource.source]
   // query is the opinionated function
-  if (source.query) {
+  if (Integration.prototype.query) {
-    ctx.body = await source.query(queryJson)
+    const integration = new Integration(datasource.config)
+    ctx.body = await integration.query(queryJson)
   } else {
     ctx.throw(400, "Datasource does not support query.")
   }

packages/server/src/api/routes/tests/datasource.spec.js

@@ -2,6 +2,9 @@ let setup = require("./utilities")
 let { basicDatasource } = setup.structures
 let { checkBuilderEndpoint } = require("./utilities/TestFunctions")
 
+jest.mock("pg")
+const pg = require("pg")
+
 describe("/datasources", () => {
   let request = setup.getRequest()
   let config = setup.getConfig()
@@ -66,6 +69,37 @@ describe("/datasources", () => {
     })
   })
 
+  describe("query", () => {
+    it("should be able to query a pg datasource", async () => {
+      const res = await request
+        .post(`/api/datasources/query`)
+        .send({
+          endpoint: {
+            datasourceId: datasource._id,
+            operation: "READ",
+            // table name below
+            entityId: "users",
+          },
+          resource: {
+            fields: ["name", "age"],
+          },
+          filters: {
+            string: {
+              name: "John",
+            },
+          },
+        })
+        .set(config.defaultHeaders())
+        .expect(200)
+      // this is mock data, can't test it
+      expect(res.body).toBeDefined()
+      expect(pg.queryMock).toHaveBeenCalledWith({
+        bindings: ["John%", 5000],
+        sql: `select "name", "age" from "users" where "name" like $1 limit $2`
+      })
+    })
+  })
+
   describe("destroy", () => {
     it("deletes queries for the datasource after deletion and returns a success message", async () => {
       await config.createQuery()

packages/server/src/db/utils.js

@@ -281,7 +281,7 @@ exports.getWebhookParams = (webhookId = null, otherProps = {}) => {
  * Generates a new datasource ID.
  * @returns {string} The new datasource ID which the webhook doc can be stored under.
  */
-exports.generateDatasourceID = ({ plus = false }) => {
+exports.generateDatasourceID = ({ plus = false } = {}) => {
   return `${
     plus ? DocumentTypes.DATASOURCE_PLUS : DocumentTypes.DATASOURCE
   }${SEPARATOR}${newid()}`

packages/server/src/integrations/base/sql.js

@@ -11,6 +11,9 @@ function addFilters(query, filters) {
       fn(key, value)
     }
   }
+  if (!filters) {
+    return query
+  }
   if (filters.string) {
     iterate(filters.string, (key, value) => {
       query = query.where(key, "like", `${value}%`)
@@ -72,11 +75,11 @@ function buildRead(knex, json, limit) {
     }
   }
   // handle pagination
-  if (paginate.page && paginate.limit) {
+  if (paginate && paginate.page && paginate.limit) {
     const page = paginate.page <= 1 ? 0 : paginate.page - 1
     const offset = page * paginate.limit
     query = query.offset(offset).limit(paginate.limit)
-  } else if (paginate.limit) {
+  } else if (paginate && paginate.limit) {
     query = query.limit(paginate.limit)
   } else {
     query.limit(limit)