Merge pull request #14177 from Budibase/budi-8434-default-value-row-processing

[BUDI-8434] Default value implementation on the backend.

packages/backend-core/src/sql/utils.ts

@@ -8,6 +8,7 @@ const DOUBLE_SEPARATOR = `${SEPARATOR}${SEPARATOR}`
 const ROW_ID_REGEX = /^\[.*]$/g
 const ENCODED_SPACE = encodeURIComponent(" ")
 const ISO_DATE_REGEX = /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}.\d{3}Z$/
+const TIME_REGEX = /^(?:\d{2}:)?(?:\d{2}:)(?:\d{2})$/
 
 export function isExternalTableID(tableId: string) {
   return tableId.startsWith(DocumentType.DATASOURCE + SEPARATOR)
@@ -147,6 +148,10 @@ export function isValidFilter(value: any) {
   return value != null && value !== ""
 }
 
+export function isValidTime(value: string) {
+  return TIME_REGEX.test(value)
+}
+
 export function sqlLog(client: string, query: string, values?: any[]) {
   if (!environment.SQL_LOGGING_ENABLE) {
     return

packages/server/src/api/routes/tests/row.spec.ts

@@ -550,6 +550,242 @@ describe.each([
 
       expect(row.name).toEqual(`{ "foo": "2023-01-26T11:48:57.000Z" }`)
     })
+
+    describe("default values", () => {
+      let table: Table
+
+      describe("string column", () => {
+        beforeAll(async () => {
+          table = await config.api.table.save(
+            saveTableRequest({
+              schema: {
+                description: {
+                  name: "description",
+                  type: FieldType.STRING,
+                  default: "default description",
+                  constraints: {
+                    presence: true,
+                  },
+                },
+              },
+            })
+          )
+        })
+
+        it("creates a new row with a default value successfully", async () => {
+          const row = await config.api.row.save(table._id!, {})
+          expect(row.description).toEqual("default description")
+        })
+
+        it("does not use default value if value specified", async () => {
+          const row = await config.api.row.save(table._id!, {
+            description: "specified description",
+          })
+          expect(row.description).toEqual("specified description")
+        })
+
+        it("uses the default value if value is null", async () => {
+          const row = await config.api.row.save(table._id!, {
+            description: null,
+          })
+          expect(row.description).toEqual("default description")
+        })
+
+        it("uses the default value if value is undefined", async () => {
+          const row = await config.api.row.save(table._id!, {
+            description: undefined,
+          })
+          expect(row.description).toEqual("default description")
+        })
+      })
+
+      describe("number column", () => {
+        beforeAll(async () => {
+          table = await config.api.table.save(
+            saveTableRequest({
+              schema: {
+                age: {
+                  name: "age",
+                  type: FieldType.NUMBER,
+                  default: "25",
+                },
+              },
+            })
+          )
+        })
+
+        it("creates a new row with a default value successfully", async () => {
+          const row = await config.api.row.save(table._id!, {})
+          expect(row.age).toEqual(25)
+        })
+
+        it("does not use default value if value specified", async () => {
+          const row = await config.api.row.save(table._id!, {
+            age: 30,
+          })
+          expect(row.age).toEqual(30)
+        })
+      })
+
+      describe("date column", () => {
+        it("creates a row with a default value successfully", async () => {
+          const table = await config.api.table.save(
+            saveTableRequest({
+              schema: {
+                date: {
+                  name: "date",
+                  type: FieldType.DATETIME,
+                  default: "2023-01-26T11:48:57.000Z",
+                },
+              },
+            })
+          )
+          const row = await config.api.row.save(table._id!, {})
+          expect(row.date).toEqual("2023-01-26T11:48:57.000Z")
+        })
+
+        it("gives an error if the default value is invalid", async () => {
+          const table = await config.api.table.save(
+            saveTableRequest({
+              schema: {
+                date: {
+                  name: "date",
+                  type: FieldType.DATETIME,
+                  default: "invalid",
+                },
+              },
+            })
+          )
+          await config.api.row.save(
+            table._id!,
+            {},
+            {
+              status: 400,
+              body: {
+                message: `Invalid default value for field 'date' - Invalid date value: "invalid"`,
+              },
+            }
+          )
+        })
+      })
+
+      describe("bindings", () => {
+        describe("string column", () => {
+          beforeAll(async () => {
+            table = await config.api.table.save(
+              saveTableRequest({
+                schema: {
+                  description: {
+                    name: "description",
+                    type: FieldType.STRING,
+                    default: `{{ date now "YYYY-MM-DDTHH:mm:ss" }}`,
+                  },
+                },
+              })
+            )
+          })
+
+          it("can use bindings in default values", async () => {
+            const row = await config.api.row.save(table._id!, {})
+            expect(row.description).toMatch(
+              /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}/
+            )
+          })
+
+          it("does not use default value if value specified", async () => {
+            const row = await config.api.row.save(table._id!, {
+              description: "specified description",
+            })
+            expect(row.description).toEqual("specified description")
+          })
+
+          it("can bind the current user", async () => {
+            const table = await config.api.table.save(
+              saveTableRequest({
+                schema: {
+                  user: {
+                    name: "user",
+                    type: FieldType.STRING,
+                    default: `{{ [Current User]._id }}`,
+                  },
+                },
+              })
+            )
+            const row = await config.api.row.save(table._id!, {})
+            expect(row.user).toEqual(config.getUser()._id)
+          })
+
+          it("cannot access current user password", async () => {
+            const table = await config.api.table.save(
+              saveTableRequest({
+                schema: {
+                  user: {
+                    name: "user",
+                    type: FieldType.STRING,
+                    default: `{{ user.password }}`,
+                  },
+                },
+              })
+            )
+            const row = await config.api.row.save(table._id!, {})
+            // For some reason it's null for internal tables, and undefined for
+            // external.
+            expect(row.user == null).toBe(true)
+          })
+        })
+
+        describe("number column", () => {
+          beforeAll(async () => {
+            table = await config.api.table.save(
+              saveTableRequest({
+                schema: {
+                  age: {
+                    name: "age",
+                    type: FieldType.NUMBER,
+                    default: `{{ sum 10 10 5 }}`,
+                  },
+                },
+              })
+            )
+          })
+
+          it("can use bindings in default values", async () => {
+            const row = await config.api.row.save(table._id!, {})
+            expect(row.age).toEqual(25)
+          })
+
+          describe("invalid default value", () => {
+            beforeAll(async () => {
+              table = await config.api.table.save(
+                saveTableRequest({
+                  schema: {
+                    age: {
+                      name: "age",
+                      type: FieldType.NUMBER,
+                      default: `{{ capitalize "invalid" }}`,
+                    },
+                  },
+                })
+              )
+            })
+
+            it("throws an error when invalid default value", async () => {
+              await config.api.row.save(
+                table._id!,
+                {},
+                {
+                  status: 400,
+                  body: {
+                    message:
+                      "Invalid default value for field 'age' - Invalid number value \"Invalid\"",
+                  },
+                }
+              )
+            })
+          })
+        })
+      })
+    })
   })
 
   describe("get", () => {

packages/server/src/api/routes/tests/viewV2.spec.ts

@@ -1022,6 +1022,11 @@ describe.each([
           schema: {
             one: { type: FieldType.STRING, name: "one" },
             two: { type: FieldType.STRING, name: "two" },
+            default: {
+              type: FieldType.STRING,
+              name: "default",
+              default: "default",
+            },
           },
         })
       )
@@ -1042,11 +1047,13 @@ describe.each([
           _viewId: view.id,
           one: "foo",
           two: "bar",
+          default: "ohnoes",
         })
 
         const row = await config.api.row.get(table._id!, newRow._id!)
         expect(row.one).toBeUndefined()
         expect(row.two).toEqual("bar")
+        expect(row.default).toEqual("default")
       })
 
       it("can't persist readonly columns", async () => {

packages/server/src/utilities/rowProcessor/index.ts

@@ -1,14 +1,22 @@
 import * as linkRows from "../../db/linkedRows"
 import { fixAutoColumnSubType, processFormulas } from "./utils"
-import { objectStore, utils } from "@budibase/backend-core"
+import {
+  cache,
+  context,
+  HTTPError,
+  objectStore,
+  utils,
+} from "@budibase/backend-core"
 import { InternalTables } from "../../db/utils"
 import { TYPE_TRANSFORM_MAP } from "./map"
 import {
   AutoFieldSubType,
   FieldType,
+  IdentityType,
   Row,
   RowAttachment,
   Table,
+  User,
 } from "@budibase/types"
 import { cloneDeep } from "lodash/fp"
 import {
@@ -19,6 +27,7 @@ import {
 } from "./bbReferenceProcessor"
 import { isExternalTableID } from "../../integrations/utils"
 import { helpers } from "@budibase/shared-core"
+import { processString } from "@budibase/string-templates"
 
 export * from "./utils"
 export * from "./attachments"
@@ -88,7 +97,34 @@ export async function processAutoColumn(
         break
     }
   }
-  return { table, row }
+}
+
+async function processDefaultValues(table: Table, row: Row) {
+  const ctx: { ["Current User"]?: User; user?: User } = {}
+
+  const identity = context.getIdentity()
+  if (identity?._id && identity.type === IdentityType.USER) {
+    const user = await cache.user.getUser(identity._id)
+    delete user.password
+
+    ctx["Current User"] = user
+    ctx.user = user
+  }
+
+  for (let [key, schema] of Object.entries(table.schema)) {
+    if ("default" in schema && schema.default != null && row[key] == null) {
+      const processed = await processString(schema.default, ctx)
+
+      try {
+        row[key] = coerce(processed, schema.type)
+      } catch (err: any) {
+        throw new HTTPError(
+          `Invalid default value for field '${key}' - ${err.message}`,
+          400
+        )
+      }
+    }
+  }
 }
 
 /**
@@ -182,8 +218,10 @@ export async function inputProcessing(
     clonedRow._rev = row._rev
   }
 
-  // handle auto columns - this returns an object like {table, row}
-  return processAutoColumn(userId, table, clonedRow, opts)
+  await processAutoColumn(userId, table, clonedRow, opts)
+  await processDefaultValues(table, clonedRow)
+
+  return { table, row: clonedRow }
 }
 
 /**

packages/server/src/utilities/rowProcessor/map.ts

@@ -1,3 +1,4 @@
+import { sql } from "@budibase/backend-core"
 import { FieldType } from "@budibase/types"
 
 const parseArrayString = (value: any) => {
@@ -91,7 +92,13 @@ export const TYPE_TRANSFORM_MAP: any = {
     [null]: null,
     //@ts-ignore
     [undefined]: undefined,
-    parse: (n: any) => parseFloat(n),
+    parse: (n: any) => {
+      const parsed = parseFloat(n)
+      if (isNaN(parsed)) {
+        throw new Error(`Invalid number value "${n}"`)
+      }
+      return parsed
+    },
   },
   [FieldType.BIGINT]: {
     "": null,
@@ -109,8 +116,15 @@ export const TYPE_TRANSFORM_MAP: any = {
     parse: (date: any) => {
       if (date instanceof Date) {
         return date.toISOString()
+      } else if (typeof date === "string" && sql.utils.isValidTime(date)) {
+        return date
+      } else {
+        const parsed = new Date(date)
+        if (isNaN(parsed.getTime())) {
+          throw new Error(`Invalid date value: "${date}"`)
         }
         return date
+      }
     },
   },
   [FieldType.ATTACHMENTS]: {

packages/types/src/documents/app/table/schema.ts

@@ -81,11 +81,13 @@ export interface NumberFieldMetadata extends Omit<BaseFieldSchema, "subtype"> {
     toTable: string
     toKey: string
   }
+  default?: string
 }
 
 export interface JsonFieldMetadata extends Omit<BaseFieldSchema, "subtype"> {
   type: FieldType.JSON
   subtype?: JsonFieldSubType.ARRAY
+  default?: string
 }
 
 export interface DateFieldMetadata extends Omit<BaseFieldSchema, "subtype"> {
@@ -94,17 +96,25 @@ export interface DateFieldMetadata extends Omit<BaseFieldSchema, "subtype"> {
   timeOnly?: boolean
   dateOnly?: boolean
   subtype?: AutoFieldSubType.CREATED_AT | AutoFieldSubType.UPDATED_AT
+  default?: string
 }
 
 export interface LongFormFieldMetadata extends BaseFieldSchema {
   type: FieldType.LONGFORM
   useRichText?: boolean | null
+  default?: string
+}
+
+export interface StringFieldMetadata extends BaseFieldSchema {
+  type: FieldType.STRING
+  default?: string
 }
 
 export interface FormulaFieldMetadata extends BaseFieldSchema {
   type: FieldType.FORMULA
   formula: string
   formulaType?: FormulaType
+  default?: string
 }
 
 export interface BBReferenceFieldMetadata
@@ -171,6 +181,7 @@ interface OtherFieldMetadata extends BaseFieldSchema {
     | FieldType.BB_REFERENCE
     | FieldType.BB_REFERENCE_SINGLE
     | FieldType.ATTACHMENTS
+    | FieldType.STRING
   >
 }
 
@@ -182,6 +193,7 @@ export type FieldSchema =
   | FormulaFieldMetadata
   | NumberFieldMetadata
   | LongFormFieldMetadata
+  | StringFieldMetadata
   | BBReferenceFieldMetadata
   | JsonFieldMetadata
   | AttachmentFieldMetadata