feat: Create execution step model

packages/backend/src/db/migrations/20220219100800_create_execution_steps.ts

@@ -0,0 +1,18 @@
+import { Knex } from 'knex';
+
+export async function up(knex: Knex): Promise<void> {
+  return knex.schema.createTable('execution_steps', (table) => {
+    table.increments('id');
+    table.integer('execution_id').references('id').inTable('executions');
+    table.integer('step_id').references('id').inTable('steps');
+    table.string('status');
+    table.text('data_in');
+    table.text('data_out');
+
+    table.timestamps(true, true);
+  });
+}
+
+export async function down(knex: Knex): Promise<void> {
+  return knex.schema.dropTable('execution_steps');
+}

packages/backend/src/models/execution-step.ts

@@ -0,0 +1,39 @@
+import Base from './base';
+import Execution from './execution';
+
+class ExecutionStep extends Base {
+  id!: string;
+  executionId!: number;
+  stepId!: number;
+  dataIn!: any;
+  dataOut!: any;
+  status: string;
+
+  static tableName = 'execution_steps';
+
+  static jsonSchema = {
+    type: 'object',
+
+    properties: {
+      id: { type: 'string' },
+      executionId: { type: 'integer' },
+      stepId: { type: 'integer' },
+      dataIn: { type: 'object' },
+      dataOut: { type: 'object' },
+      status: { type: 'string', enum: ['success', 'failure'] },
+    },
+  };
+
+  static relationMappings = () => ({
+    execution: {
+      relation: Base.BelongsToOneRelation,
+      modelClass: Execution,
+      join: {
+        from: 'execution_steps.execution_id',
+        to: 'executions.id',
+      },
+    },
+  });
+}
+
+export default ExecutionStep;