diff --git a/app/src/interfaces/files/files.vue b/app/src/interfaces/files/files.vue
index 5db7f7a33d..e4f2ca262e 100644
--- a/app/src/interfaces/files/files.vue
+++ b/app/src/interfaces/files/files.vue
@@ -45,7 +45,7 @@
 			:collection="relationFields.junctionCollection"
 			:primary-key="currentlyEditing || '+'"
 			:edits="editsAtStart"
-			:related-primary-key="relationFields.relationPkField"
+			:related-primary-key="relationFields.relationPkField || '+'"
 			:junction-field="relationFields.junctionRelation"
 			@input="stageEdits"
 			@update:active="cancelEdit"
@@ -165,10 +165,8 @@ export default defineComponent({
 
 		const { cancelEdit, stageEdits, editsAtStart, editItem, currentlyEditing } = useEdit(
 			value,
-			items,
 			relationFields,
-			emitter,
-			getJunctionFromRelatedId
+			emitter
 		);
 
 		const { stageSelection, selectModalActive, selectionFilters } = useSelection(
diff --git a/app/src/interfaces/many-to-many/many-to-many.vue b/app/src/interfaces/many-to-many/many-to-many.vue
index af3de9b0e6..21f23e5254 100644
--- a/app/src/interfaces/many-to-many/many-to-many.vue
+++ b/app/src/interfaces/many-to-many/many-to-many.vue
@@ -5,7 +5,7 @@
 	<div class="one-to-many" v-else>
 		<v-table
 			:loading="loading"
-			:items="displayItems"
+			:items="items"
 			:headers.sync="tableHeaders"
 			show-resize
 			inline
@@ -15,13 +15,13 @@
 			<template v-for="header in tableHeaders" v-slot:[`item.${header.value}`]="{ item }">
 				<render-display
 					:key="header.value"
-					:value="item[header.value]"
+					:value="get(item, header.value)"
 					:display="header.field.display"
 					:options="header.field.displayOptions"
 					:interface="header.field.interface"
 					:interface-options="header.field.interfaceOptions"
 					:type="header.field.type"
-					:collection="junctionCollection.collection"
+					:collection="relationFields.junctionCollection"
 					:field="header.field.field"
 				/>
 			</template>
@@ -46,9 +46,9 @@
 		<modal-detail
 			v-if="!disabled"
 			:active="currentlyEditing !== null"
-			:collection="relationCollection.collection"
+			:collection="relationFields.junctionCollection"
 			:primary-key="currentlyEditing || '+'"
-			:related-primary-key="relationFields.relationPkField"
+			:related-primary-key="relatedPrimaryKey || '+'"
 			:junction-field="relationFields.junctionRelation"
 			:edits="editsAtStart"
 			@input="stageEdits"
@@ -71,6 +71,7 @@
 import { defineComponent, ref, computed, watch, PropType, toRefs } from '@vue/composition-api';
 import ModalDetail from '@/views/private/components/modal-detail';
 import ModalBrowse from '@/views/private/components/modal-browse';
+import { get } from 'lodash';
 
 import useActions from './use-actions';
 import useRelation from './use-relation';
@@ -128,7 +129,7 @@ export default defineComponent({
 			getJunctionFromRelatedId,
 		} = useActions(value, relationFields, emitter);
 
-		const { tableHeaders, items, loading, error, displayItems } = usePreview(
+		const { tableHeaders, items, loading, error } = usePreview(
 			value,
 			fields,
 			relationFields,
@@ -138,17 +139,15 @@ export default defineComponent({
 			getPrimaryKeys
 		);
 
-		const { currentlyEditing, editItem, editsAtStart, stageEdits, cancelEdit } = useEdit(
+		const { currentlyEditing, editItem, editsAtStart, stageEdits, cancelEdit, relatedPrimaryKey } = useEdit(
 			value,
-			items,
 			relationFields,
-			emitter,
-			getJunctionFromRelatedId
+			emitter
 		);
 
 		const { stageSelection, selectModalActive, selectionFilters } = useSelection(
 			value,
-			displayItems,
+			items,
 			relationFields,
 			emitter
 		);
@@ -168,10 +167,11 @@ export default defineComponent({
 			stageSelection,
 			selectModalActive,
 			deleteItem,
-			displayItems,
 			selectionFilters,
 			items,
 			relationFields,
+			relatedPrimaryKey,
+			get,
 		};
 	},
 });
diff --git a/app/src/interfaces/many-to-many/options.vue b/app/src/interfaces/many-to-many/options.vue
index ecec4efd72..43750161a9 100644
--- a/app/src/interfaces/many-to-many/options.vue
+++ b/app/src/interfaces/many-to-many/options.vue
@@ -1,14 +1,16 @@
 <template>
-	<v-notice type="warning" v-if="relatedCollection === null">
+	<v-notice type="warning" v-if="junctionCollection === null">
 		{{ $t('interfaces.one-to-many.no_collection') }}
 	</v-notice>
 	<div v-else class="form-grid">
 		<div class="field full">
 			<p class="type-label">{{ $t('select_fields') }}</p>
 			<v-field-select
-				:collection="relatedCollection"
+				:collection="junctionCollection"
 				v-model="fields"
-				:inject="relatedCollectionExists ? null : { fields: newFields, collections: newCollections, relations }"
+				:inject="
+					junctionCollectionExists ? null : { fields: newFields, collections: newCollections, relations }
+				"
 			/>
 		</div>
 	</div>
@@ -20,7 +22,6 @@ import { defineComponent, PropType, computed } from '@vue/composition-api';
 import { useRelationsStore } from '@/stores/';
 import { Relation, Collection } from '@/types';
 import { useCollectionsStore } from '../../stores';
-
 export default defineComponent({
 	props: {
 		collection: {
@@ -51,7 +52,6 @@ export default defineComponent({
 	setup(props, { emit }) {
 		const collectionsStore = useCollectionsStore();
 		const relationsStore = useRelationsStore();
-
 		const fields = computed({
 			get() {
 				return props.value?.fields;
@@ -63,41 +63,26 @@ export default defineComponent({
 				});
 			},
 		});
-
-		const relatedCollection = computed(() => {
+		const junctionCollection = computed(() => {
 			if (!props.fieldData || !props.relations || props.relations.length === 0) return null;
-
 			const { field } = props.fieldData;
-
 			const junctionRelation = props.relations.find(
 				(relation) => relation.one_collection === props.collection && relation.one_field === field
 			);
-
-			if (junctionRelation === undefined) return;
-
-			const relatedCollection = props.relations.find(
-				(relation) =>
-					relation.one_collection !== props.collection &&
-					relation.many_field === junctionRelation.junction_field
-			);
-
-			return relatedCollection?.one_collection || null;
+			return junctionRelation?.many_collection || null;
 		});
-
-		const relatedCollectionExists = computed(() => {
+		const junctionCollectionExists = computed(() => {
 			return !!collectionsStore.state.collections.find(
-				(collection) => collection.collection === relatedCollection.value
+				(collection) => collection.collection === junctionCollection.value
 			);
 		});
-
-		return { fields, relatedCollection, relatedCollectionExists };
+		return { fields, junctionCollection, junctionCollectionExists };
 	},
 });
 </script>
 
 <style lang="scss" scoped>
 @import '@/styles/mixins/form-grid';
-
 .form-grid {
 	@include form-grid;
 }
diff --git a/app/src/interfaces/many-to-many/use-actions.ts b/app/src/interfaces/many-to-many/use-actions.ts
index c709275f2a..87de49ca27 100644
--- a/app/src/interfaces/many-to-many/use-actions.ts
+++ b/app/src/interfaces/many-to-many/use-actions.ts
@@ -1,5 +1,6 @@
 import { Ref } from '@vue/composition-api';
 import { RelationInfo } from './use-relation';
+import { get, has } from 'lodash';
 
 export default function useActions(
 	value: Ref<(string | number | Record<string, any>)[] | null>,
@@ -12,8 +13,7 @@ export default function useActions(
 
 		return (
 			value.value.find(
-				(item) =>
-					(typeof item === 'object' && junctionPkField in item && item[junctionPkField] === id) || item === id
+				(item) => get(item, junctionPkField) === id || (['string', 'number'].includes(typeof item), item === id)
 			) || null
 		);
 	}
@@ -34,11 +34,7 @@ export default function useActions(
 		if (value.value === null || junctionRelation === null) return [];
 
 		return value.value.filter(
-			(item) =>
-				typeof item === 'object' &&
-				junctionRelation in item &&
-				typeof item[junctionRelation] === 'object' &&
-				relationPkField in item[junctionRelation] === false
+			(item) => has(item, junctionRelation) && has(item, [junctionRelation, relationPkField]) === false
 		) as Record<string, any>[];
 	}
 
@@ -47,19 +43,13 @@ export default function useActions(
 
 		if (value.value === null || junctionRelation === null) return [];
 
-		return value.value.filter(
-			(item) =>
-				typeof item === 'object' &&
-				junctionRelation in item &&
-				typeof item[junctionRelation] === 'object' &&
-				relationPkField in item[junctionRelation] === true
-		) as Record<string, any>[];
+		return value.value.filter((item) => has(item, [junctionRelation, relationPkField])) as Record<string, any>[];
 	}
 
 	function getExistingItems() {
 		if (value.value === null) return [];
 
-		return value.value.filter((item) => typeof item === 'string' || typeof item === 'number');
+		return value.value.filter((item) => ['string', 'number'].includes(typeof item));
 	}
 
 	function getPrimaryKeys(): (string | number)[] {
diff --git a/app/src/interfaces/many-to-many/use-edit.ts b/app/src/interfaces/many-to-many/use-edit.ts
index 86756e0a4c..1f0bbeed50 100644
--- a/app/src/interfaces/many-to-many/use-edit.ts
+++ b/app/src/interfaces/many-to-many/use-edit.ts
@@ -1,67 +1,58 @@
 import { Ref, ref } from '@vue/composition-api';
 import { RelationInfo } from './use-relation';
-import { isEqual } from 'lodash';
+import { isEqual, get } from 'lodash';
 
 export default function useEdit(
 	value: Ref<(string | number | Record<string, any>)[] | null>,
-	items: Ref<Record<string, any>[]>,
 	relation: Ref<RelationInfo>,
-	emit: (newVal: any[] | null) => void,
-	getJunctionFromRelatedId: (id: string | number, items: Record<string, any>[]) => Record<string, any> | null
+	emit: (newVal: any[] | null) => void
 ) {
 	// Primary key of the item we're currently editing. If null, the edit modal should be
 	// closed
 	const currentlyEditing = ref<string | number | null>(null);
+	const relatedPrimaryKey = ref<string | number | null>(null);
 
 	// This keeps track of the starting values so we can match with it
 	const editsAtStart = ref<Record<string, any>>({});
 
 	function editItem(item: any) {
-		const { relationPkField } = relation.value;
-		const hasPrimaryKey = relationPkField in item;
+		const { relationPkField, junctionRelation, junctionPkField } = relation.value;
 
 		editsAtStart.value = item;
-		currentlyEditing.value = hasPrimaryKey ? item[relationPkField] : -1;
+		relatedPrimaryKey.value = get(item, [junctionRelation, relationPkField], null);
+		currentlyEditing.value = get(item, [junctionPkField], null);
 	}
 
 	function stageEdits(edits: any) {
 		const { relationPkField, junctionRelation, junctionPkField } = relation.value;
-		const editsWrapped = { [junctionRelation]: edits };
-		const hasPrimaryKey = relationPkField in editsAtStart.value;
-		const junctionItem = hasPrimaryKey
-			? getJunctionFromRelatedId(editsAtStart.value[relationPkField], items.value)
-			: null;
 
 		const newValue = (value.value || []).map((item) => {
-			if (junctionItem !== null && junctionPkField in junctionItem) {
-				const id = junctionItem[junctionPkField];
+			if (currentlyEditing.value !== null) {
+				const id = currentlyEditing.value;
 
 				if (typeof item === 'object' && junctionPkField in item) {
-					if (item[junctionPkField] === id) return { [junctionRelation]: edits, [junctionPkField]: id };
-				} else if (typeof item === 'number' || typeof item === 'string') {
-					if (item === id) return { [junctionRelation]: edits, [junctionPkField]: id };
+					if (item[junctionPkField] === id) return edits;
+				} else if (['number', 'string'].includes(typeof item)) {
+					if (item === id) return edits;
 				}
 			}
 
-			if (typeof item === 'object' && relationPkField in edits && junctionRelation in item) {
-				const id = edits[relationPkField];
-				const relatedItem = item[junctionRelation] as string | number | Record<string, any>;
-				if (typeof relatedItem === 'object' && relationPkField in relatedItem) {
-					if (relatedItem[relationPkField] === id) return editsWrapped;
-				} else if (typeof relatedItem === 'string' || typeof relatedItem === 'number') {
-					if (relatedItem === id) return editsWrapped;
-				}
+			if (relatedPrimaryKey.value != null) {
+				const id = relatedPrimaryKey.value;
+
+				if (get(item, [junctionRelation], null) === id) return edits;
+				if (get(item, [junctionRelation, relationPkField], null) === id) return edits;
 			}
 
-			if (isEqual({ [junctionRelation]: editsAtStart.value }, item)) {
-				return editsWrapped;
+			if (isEqual(editsAtStart.value, item)) {
+				return edits;
 			}
 
 			return item;
 		});
 
-		if (hasPrimaryKey === false && newValue.includes(editsWrapped) === false) {
-			newValue.push(editsWrapped);
+		if (relatedPrimaryKey.value === null && currentlyEditing.value === null && newValue.includes(edits) === false) {
+			newValue.push(edits);
 		}
 
 		if (newValue.length === 0) emit(null);
@@ -71,7 +62,8 @@ export default function useEdit(
 	function cancelEdit() {
 		editsAtStart.value = {};
 		currentlyEditing.value = null;
+		relatedPrimaryKey.value = null;
 	}
 
-	return { currentlyEditing, editItem, editsAtStart, stageEdits, cancelEdit };
+	return { currentlyEditing, editItem, editsAtStart, stageEdits, cancelEdit, relatedPrimaryKey };
 }
diff --git a/app/src/interfaces/many-to-many/use-preview.ts b/app/src/interfaces/many-to-many/use-preview.ts
index 8ef9099d60..9f88d23768 100644
--- a/app/src/interfaces/many-to-many/use-preview.ts
+++ b/app/src/interfaces/many-to-many/use-preview.ts
@@ -24,6 +24,21 @@ export default function usePreview(
 	const items = ref<Record<string, any>[]>([]);
 	const error = ref(null);
 
+	function getRelatedFields(fields: string[]) {
+		const { junctionRelation } = relation.value;
+
+		return fields
+			.map((field) => {
+				const sections = field.split('.');
+				if (junctionRelation === sections[0] && sections.length === 2) return sections[1];
+			})
+			.filter((i) => i);
+	}
+
+	function getJunctionFields() {
+		return (fields.value || []).filter((field) => field.includes('.') === false);
+	}
+
 	watch(
 		() => value.value,
 		async (newVal) => {
@@ -40,7 +55,7 @@ export default function usePreview(
 			const junctionItems = await loadRelatedIds();
 			const relatedPrimaryKeys = junctionItems.map((junction) => junction[junctionRelation]);
 
-			const filteredFields = [...(fields.value.length > 0 ? fields.value : getDefaultFields())];
+			const filteredFields = [...(fields.value.length > 0 ? getRelatedFields(fields.value) : getDefaultFields())];
 
 			if (filteredFields.includes(relationPkField) === false) filteredFields.push(relationPkField);
 
@@ -103,12 +118,18 @@ export default function usePreview(
 			const primaryKeys = getPrimaryKeys();
 
 			if (primaryKeys.length > 0) {
+				const filteredFields = getJunctionFields();
+
+				if (filteredFields.includes(junctionPkField) === false) filteredFields.push(junctionPkField);
+				if (filteredFields.includes(junctionRelation) === false) filteredFields.push(junctionRelation);
+
 				const endpoint = relation.value.junctionCollection.startsWith('directus_')
 					? `/${relation.value.junctionCollection.substring(9)}`
 					: `/items/${relation.value.junctionCollection}`;
 
 				const response = await api.get(endpoint, {
 					params: {
+						fields: filteredFields,
 						[`filter[${junctionPkField}][_in]`]: getPrimaryKeys().join(','),
 					},
 				});
@@ -127,19 +148,19 @@ export default function usePreview(
 		return [];
 	}
 
-	const displayItems = computed(() => {
-		const { junctionRelation } = relation.value;
-		return items.value.map((item) => item[junctionRelation]);
-	});
-
 	// Seeing we don't care about saving those tableHeaders, we can reset it whenever the
 	// fields prop changes (most likely when we're navigating to a different o2m context)
 	watch(
 		() => fields.value,
 		() => {
-			tableHeaders.value = (fields.value.length > 0 ? fields.value : getDefaultFields())
+			const { junctionRelation, junctionCollection } = relation.value;
+
+			tableHeaders.value = (fields.value.length > 0
+				? fields.value
+				: getDefaultFields().map((field) => `${junctionRelation}.${field}`)
+			)
 				.map((fieldKey) => {
-					const field = fieldsStore.getField(relation.value.relationCollection, fieldKey);
+					let field = fieldsStore.getField(junctionCollection, fieldKey);
 
 					if (!field) return null;
 
@@ -171,5 +192,5 @@ export default function usePreview(
 		return fields.slice(0, 3).map((field: Field) => field.field);
 	}
 
-	return { tableHeaders, displayItems, items, loading, error };
+	return { tableHeaders, items, loading, error };
 }
diff --git a/app/src/interfaces/many-to-many/use-selection.ts b/app/src/interfaces/many-to-many/use-selection.ts
index 3d180154ac..1eff19c858 100644
--- a/app/src/interfaces/many-to-many/use-selection.ts
+++ b/app/src/interfaces/many-to-many/use-selection.ts
@@ -1,23 +1,24 @@
 import { Ref, ref, computed } from '@vue/composition-api';
 import { RelationInfo } from './use-relation';
+import { get } from 'lodash';
 import { Filter } from '@/types';
 
 export default function useSelection(
 	value: Ref<(string | number | Record<string, any>)[] | null>,
-	displayItems: Ref<Record<string, any>[]>,
+	items: Ref<Record<string, any>[]>,
 	relation: Ref<RelationInfo>,
 	emit: (newVal: any[] | null) => void
 ) {
 	const selectModalActive = ref(false);
 
 	const selectedPrimaryKeys = computed(() => {
-		if (displayItems.value === null) return [];
+		if (items.value === null) return [];
 
-		const { relationPkField } = relation.value;
+		const { relationPkField, junctionRelation } = relation.value;
 
-		const selectedKeys: (number | string)[] = displayItems.value
-			.filter((currentItem) => relationPkField in currentItem)
-			.map((currentItem) => currentItem[relationPkField]);
+		const selectedKeys: (number | string)[] = items.value
+			.map((currentItem) => get(currentItem, [junctionRelation, relationPkField]))
+			.filter((i) => i);
 
 		return selectedKeys;
 	});
@@ -39,11 +40,7 @@ export default function useSelection(
 	});
 
 	function stageSelection(newSelection: (number | string)[]) {
-		const { junctionRelation } = relation.value;
-
-		const selection = newSelection
-			.filter((item) => selectedPrimaryKeys.value.includes(item) === false)
-			.map((item) => ({ [junctionRelation]: item }));
+		const selection = newSelection.filter((item) => selectedPrimaryKeys.value.includes(item) === false);
 
 		const newVal = [...selection, ...(value.value || [])];
 		if (newVal.length === 0) emit(null);