diff --git a/packages/builder/src/components/backend/Datasources/CreateEditRelationship.svelte b/packages/builder/src/components/backend/Datasources/CreateEditRelationship.svelte
index 230748b577..644ee9216b 100644
--- a/packages/builder/src/components/backend/Datasources/CreateEditRelationship.svelte
+++ b/packages/builder/src/components/backend/Datasources/CreateEditRelationship.svelte
@@ -45,6 +45,23 @@
 
   const touched = writable({})
 
+  function invalidThroughTable({ through, throughTo, throughFrom }) {
+    // need to know the foreign key columns to check error
+    if (!through || !throughTo || !throughFrom) {
+      return false
+    }
+    const throughTable = plusTables.find(tbl => tbl._id === through)
+    const otherColumns = Object.values(throughTable.schema).filter(
+      col => col.name !== throughFrom && col.name !== throughTo
+    )
+    for (let col of otherColumns) {
+      if (col.constraints?.presence && !col.autocolumn) {
+        return true
+      }
+    }
+    return false
+  }
+
   function checkForErrors(fromRelate, toRelate) {
     const isMany =
       fromRelate.relationshipType === RelationshipTypes.MANY_TO_MANY
@@ -59,6 +76,10 @@
     if ($touched.through && isMany && !fromRelate.through) {
       errObj.through = tableNotSet
     }
+    if ($touched.through && invalidThroughTable(fromRelate)) {
+      errObj.through =
+        "Table contains non-nullable columns which aren't generated"
+    }
     if ($touched.foreign && !isMany && !fromRelate.fieldName) {
       errObj.foreign = "Please pick the foreign key"
     }
diff --git a/packages/server/src/api/controllers/row/ExternalRequest.ts b/packages/server/src/api/controllers/row/ExternalRequest.ts
index de4ce317ef..a343553fc8 100644
--- a/packages/server/src/api/controllers/row/ExternalRequest.ts
+++ b/packages/server/src/api/controllers/row/ExternalRequest.ts
@@ -588,7 +588,10 @@ export class ExternalRequest {
     for (let [colName, { isMany, rows, tableId }] of Object.entries(related)) {
       const table: Table | undefined = this.getTable(tableId)
       // if its not the foreign key skip it, nothing to do
-      if (!table || (table.primary && table.primary.indexOf(colName) !== -1)) {
+      if (
+        !table ||
+        (!isMany && table.primary && table.primary.indexOf(colName) !== -1)
+      ) {
         continue
       }
       for (let row of rows) {
diff --git a/packages/server/src/integrations/base/types.ts b/packages/server/src/integrations/base/types.ts
new file mode 100644
index 0000000000..7144d20206
--- /dev/null
+++ b/packages/server/src/integrations/base/types.ts
@@ -0,0 +1,134 @@
+export interface MSSQLTablesResponse {
+  TABLE_CATALOG: string
+  TABLE_SCHEMA: string
+  TABLE_NAME: string
+  TABLE_TYPE: string
+}
+
+export interface MSSQLColumn {
+  IS_COMPUTED: number
+  IS_IDENTITY: number
+  TABLE_CATALOG: string
+  TABLE_SCHEMA: string
+  TABLE_NAME: string
+  COLUMN_NAME: string
+  ORDINAL_POSITION: number
+  COLUMN_DEFAULT: null | any
+  IS_NULLABLE: "NO" | "YES"
+  DATA_TYPE: string
+  CHARACTER_MAXIMUM_LENGTH: null | number
+  CHARACTER_OCTET_LENGTH: null | number
+  NUMERIC_PRECISION: null | number
+  NUMERIC_PRECISION_RADIX: null | number
+  NUMERIC_SCALE: null | number
+  DATETIME_PRECISION: null | string
+  CHARACTER_SET_CATALOG: null | string
+  CHARACTER_SET_SCHEMA: null | string
+  CHARACTER_SET_NAME: null | string
+  COLLATION_CATALOG: null | string
+  COLLATION_SCHEMA: null | string
+  COLLATION_NAME: null | string
+  DOMAIN_CATALOG: null | string
+  DOMAIN_SCHEMA: null | string
+  DOMAIN_NAME: null | string
+}
+
+export interface PostgresColumn {
+  table_catalog: string
+  table_schema: string
+  table_name: string
+  column_name: string
+  ordinal_position: number
+  column_default: null | any
+  is_nullable: "NO" | "YES"
+  data_type: string
+  character_maximum_length: null | number
+  character_octet_length: null | number
+  numeric_precision: null | number
+  numeric_precision_radix: null | number
+  numeric_scale: null | number
+  datetime_precision: null | string
+  interval_type: null | string
+  interval_precision: null | string
+  character_set_catalog: null | string
+  character_set_schema: null | string
+  character_set_name: null | string
+  collation_catalog: null | string
+  collation_schema: null | string
+  collation_name: null | string
+  domain_catalog: null | string
+  domain_schema: null | string
+  domain_name: null | string
+  udt_catalog: string
+  udt_schema: string
+  udt_name: string
+  scope_catalog: null | string
+  scope_schema: null | string
+  scope_name: null | string
+  maximum_cardinality: null | string
+  dtd_identifier: string
+  is_self_referencing: "NO" | "YES"
+  is_identity: "NO" | "YES"
+  identity_generation: null | number
+  identity_start: null | number
+  identity_increment: null | number
+  identity_maximum: null | number
+  identity_minimum: null | number
+  identity_cycle: "NO" | "YES"
+  is_generated: "NEVER"
+  generation_expression: null | string
+  is_updatable: "NO" | "YES"
+}
+
+export interface MySQLColumn {
+  Field: string
+  Type: string
+  Null: "NO" | "YES"
+  Key: "PRI" | "MUL" | ""
+  Default: null | any
+  Extra: null | string
+}
+
+/**
+ * Raw query response
+ */
+export interface OracleColumnsResponse {
+  TABLE_NAME: string
+  COLUMN_NAME: string
+  DATA_TYPE: string
+  DATA_DEFAULT: null | string
+  COLUMN_ID: number
+  CONSTRAINT_NAME: null | string
+  CONSTRAINT_TYPE: null | string
+  R_CONSTRAINT_NAME: null | string
+  SEARCH_CONDITION: null | string
+}
+
+/**
+ * An oracle constraint
+ */
+export interface OracleConstraint {
+  name: string
+  type: string
+  relatedConstraintName: null | string
+  searchCondition: null | string
+}
+
+/**
+ * An oracle column and it's related constraints
+ */
+export interface OracleColumn {
+  name: string
+  type: string
+  default: null | string
+  id: number
+  constraints: { [key: string]: OracleConstraint }
+}
+
+/**
+ * An oracle table and it's related columns
+ */
+export interface OracleTable {
+  name: string
+  columns: { [key: string]: OracleColumn }
+}
diff --git a/packages/server/src/integrations/microsoftSqlServer.ts b/packages/server/src/integrations/microsoftSqlServer.ts
index 8c136dcc0f..437a9812a6 100644
--- a/packages/server/src/integrations/microsoftSqlServer.ts
+++ b/packages/server/src/integrations/microsoftSqlServer.ts
@@ -17,6 +17,7 @@ import {
   SqlClient,
 } from "./utils"
 import Sql from "./base/sql"
+import { MSSQLTablesResponse, MSSQLColumn } from "./base/types"
 
 const sqlServer = require("mssql")
 const DEFAULT_SCHEMA = "dbo"
@@ -31,41 +32,6 @@ interface MSSQLConfig {
   encrypt?: boolean
 }
 
-interface TablesResponse {
-  TABLE_CATALOG: string
-  TABLE_SCHEMA: string
-  TABLE_NAME: string
-  TABLE_TYPE: string
-}
-
-type MSSQLColumn = {
-  IS_COMPUTED: number
-  IS_IDENTITY: number
-  TABLE_CATALOG: string
-  TABLE_SCHEMA: string
-  TABLE_NAME: string
-  COLUMN_NAME: string
-  ORDINAL_POSITION: number
-  COLUMN_DEFAULT: null | any
-  IS_NULLABLE: "NO" | "YES"
-  DATA_TYPE: string
-  CHARACTER_MAXIMUM_LENGTH: null | number
-  CHARACTER_OCTET_LENGTH: null | number
-  NUMERIC_PRECISION: null | string
-  NUMERIC_PRECISION_RADIX: null | string
-  NUMERIC_SCALE: null | string
-  DATETIME_PRECISION: null | string
-  CHARACTER_SET_CATALOG: null | string
-  CHARACTER_SET_SCHEMA: null | string
-  CHARACTER_SET_NAME: null | string
-  COLLATION_CATALOG: null | string
-  COLLATION_SCHEMA: null | string
-  COLLATION_NAME: null | string
-  DOMAIN_CATALOG: null | string
-  DOMAIN_SCHEMA: null | string
-  DOMAIN_NAME: null | string
-}
-
 const SCHEMA: Integration = {
   docs: "https://github.com/tediousjs/node-mssql",
   plus: true,
@@ -238,7 +204,7 @@ class SqlServerIntegration extends Sql implements DatasourcePlus {
    */
   async buildSchema(datasourceId: string, entities: Record<string, Table>) {
     await this.connect()
-    let tableInfo: TablesResponse[] = await this.runSQL(this.TABLES_SQL)
+    let tableInfo: MSSQLTablesResponse[] = await this.runSQL(this.TABLES_SQL)
     if (tableInfo == null || !Array.isArray(tableInfo)) {
       throw "Unable to get list of tables in database"
     }
diff --git a/packages/server/src/integrations/mysql.ts b/packages/server/src/integrations/mysql.ts
index acf8f4904a..136d84361a 100644
--- a/packages/server/src/integrations/mysql.ts
+++ b/packages/server/src/integrations/mysql.ts
@@ -18,6 +18,7 @@ import {
 import dayjs from "dayjs"
 const { NUMBER_REGEX } = require("../utilities")
 import Sql from "./base/sql"
+import { MySQLColumn } from "./base/types"
 
 const mysql = require("mysql2/promise")
 
@@ -203,11 +204,11 @@ class MySQLIntegration extends Sql implements DatasourcePlus {
 
     try {
       // get the tables first
-      const tablesResp = await this.internalQuery(
+      const tablesResp: Record<string, string>[] = await this.internalQuery(
         { sql: "SHOW TABLES;" },
         { connect: false }
       )
-      const tableNames = tablesResp.map(
+      const tableNames: string[] = tablesResp.map(
         (obj: any) =>
           obj[`Tables_in_${database}`] ||
           obj[`Tables_in_${database.toLowerCase()}`]
@@ -215,7 +216,7 @@ class MySQLIntegration extends Sql implements DatasourcePlus {
       for (let tableName of tableNames) {
         const primaryKeys = []
         const schema: TableSchema = {}
-        const descResp = await this.internalQuery(
+        const descResp: MySQLColumn[] = await this.internalQuery(
           { sql: `DESCRIBE \`${tableName}\`;` },
           { connect: false }
         )
diff --git a/packages/server/src/integrations/oracle.ts b/packages/server/src/integrations/oracle.ts
index 13c2d11b8b..9ec9c3f858 100644
--- a/packages/server/src/integrations/oracle.ts
+++ b/packages/server/src/integrations/oracle.ts
@@ -24,6 +24,12 @@ import {
   ExecuteOptions,
   Result,
 } from "oracledb"
+import {
+  OracleTable,
+  OracleColumn,
+  OracleColumnsResponse,
+  OracleConstraint,
+} from "./base/types"
 let oracledb: any
 try {
   oracledb = require("oracledb")
@@ -89,50 +95,6 @@ const SCHEMA: Integration = {
 
 const UNSUPPORTED_TYPES = ["BLOB", "CLOB", "NCLOB"]
 
-/**
- * Raw query response
- */
-interface ColumnsResponse {
-  TABLE_NAME: string
-  COLUMN_NAME: string
-  DATA_TYPE: string
-  DATA_DEFAULT: string | null
-  COLUMN_ID: number
-  CONSTRAINT_NAME: string | null
-  CONSTRAINT_TYPE: string | null
-  R_CONSTRAINT_NAME: string | null
-  SEARCH_CONDITION: string | null
-}
-
-/**
- * An oracle constraint
- */
-interface OracleConstraint {
-  name: string
-  type: string
-  relatedConstraintName: string | null
-  searchCondition: string | null
-}
-
-/**
- * An oracle column and it's related constraints
- */
-interface OracleColumn {
-  name: string
-  type: string
-  default: string | null
-  id: number
-  constraints: { [key: string]: OracleConstraint }
-}
-
-/**
- * An oracle table and it's related columns
- */
-interface OracleTable {
-  name: string
-  columns: { [key: string]: OracleColumn }
-}
-
 const OracleContraintTypes = {
   PRIMARY: "P",
   NOT_NULL_OR_CHECK: "C",
@@ -195,7 +157,7 @@ class OracleIntegration extends Sql implements DatasourcePlus {
   /**
    * Map the flat tabular columns and constraints data into a nested object
    */
-  private mapColumns(result: Result<ColumnsResponse>): {
+  private mapColumns(result: Result<OracleColumnsResponse>): {
     [key: string]: OracleTable
   } {
     const oracleTables: { [key: string]: OracleTable } = {}
@@ -299,7 +261,7 @@ class OracleIntegration extends Sql implements DatasourcePlus {
    * @param entities - the tables that are to be built
    */
   async buildSchema(datasourceId: string, entities: Record<string, Table>) {
-    const columnsResponse = await this.internalQuery<ColumnsResponse>({
+    const columnsResponse = await this.internalQuery<OracleColumnsResponse>({
       sql: this.COLUMNS_SQL,
     })
     const oracleTables = this.mapColumns(columnsResponse)
@@ -334,7 +296,9 @@ class OracleIntegration extends Sql implements DatasourcePlus {
             fieldSchema = {
               autocolumn: OracleIntegration.isAutoColumn(oracleColumn),
               name: columnName,
-              // TODO: add required constraint
+              constraints: {
+                presence: false,
+              },
               ...this.internalConvertType(oracleColumn),
             }
             table.schema[columnName] = fieldSchema
@@ -344,6 +308,12 @@ class OracleIntegration extends Sql implements DatasourcePlus {
           Object.values(oracleColumn.constraints).forEach(oracleConstraint => {
             if (oracleConstraint.type === OracleContraintTypes.PRIMARY) {
               table.primary!.push(columnName)
+            } else if (
+              oracleConstraint.type === OracleContraintTypes.NOT_NULL_OR_CHECK
+            ) {
+              table.schema[columnName].constraints = {
+                presence: true,
+              }
             }
           })
         })
diff --git a/packages/server/src/integrations/postgres.ts b/packages/server/src/integrations/postgres.ts
index c0bda099eb..eba0d3691d 100644
--- a/packages/server/src/integrations/postgres.ts
+++ b/packages/server/src/integrations/postgres.ts
@@ -15,9 +15,10 @@ import {
   SqlClient,
 } from "./utils"
 import Sql from "./base/sql"
+import { PostgresColumn } from "./base/types"
+import { escapeDangerousCharacters } from "../utilities"
 
 const { Client, types } = require("pg")
-const { escapeDangerousCharacters } = require("../utilities")
 
 // Return "date" and "timestamp" types as plain strings.
 // This lets us reference the original stored timezone.
@@ -237,7 +238,8 @@ class PostgresIntegration extends Sql implements DatasourcePlus {
     }
 
     try {
-      const columnsResponse = await this.client.query(this.COLUMNS_SQL)
+      const columnsResponse: { rows: PostgresColumn[] } =
+        await this.client.query(this.COLUMNS_SQL)
 
       const tables: { [key: string]: Table } = {}