Channels

Channels & Sellers

Each channel is also assigned a single Seller. This entity is used to represent the vendor or seller of the products in the channel. This is useful for implementing a marketplace, where each channel represents a distinct vendor. The Seller entity can be extended with custom fields to store additional information about the seller, such as a logo, contact details etc.

Channels, Currencies & Prices

Each Channel has a set of availableCurrencyCodes, and one of these is designated as the defaultCurrencyCode, which sets the default currency for all monetary values in that channel.

Internally, there is a one-to-many relation from ProductVariant to ProductVariantPrice. So the ProductVariant does not hold a price for the product - this is actually stored on the ProductVariantPrice entity, and there will be at least one for each Channel to which the ProductVariant has been assigned.

In this diagram we can see that every channel has at least 1 ProductVariantPrice. In the case of the UK Channel, there are 2 prices assigned - one for GBP and one for USD. This means that you are able to define multiple prices in different currencies on a single product variant for a single channel.

Keeping prices synchronized

When you have products assigned to multiple channels, updates to the price of a product in one channel will not automatically be reflected in other channels. For instance, in the diagram above, both the Default channel and the UK channel have a price in USD for the same product variant.

If an administrator of the UK channel changes the USD price to $20, the price in the Default channel will remain at $30. This is the default behavior, and is controlled by the ProductVariantPriceUpdateStrategy.

If you want to keep prices synchronized across all channels, you can set the syncPricesAcrossChannels property of the DefaultProductVariantPriceUpdateStrategy to true. This will ensure that when the price of a product variant is updated in one channel, the price in all other channels (of that particular currency) will be updated to match.

You may however require even more sophisticated logic. For instance, you may want a one-way synchronization, where the price in the Default channel is always the master price, and the prices in other channels are updated to match. In this case, you can create a custom ProductVariantPriceUpdateStrategy which implements the desired logic.

Use cases

Single shop

This is the simplest set-up. You just use the default Channel for everything.

Multiple separate shops

Let's say you are running multiple distinct businesses, each with its own distinct inventory and possibly different currencies. In this case, you set up a Channel for each shop and create the Product & Variants in the relevant shop's Channel.

The default Channel can then be used by the superadmin for administrative purposes, but other than that the default Channel would not be used. Storefronts would only target a specific shop's Channel.

Multiple shops sharing inventory

Let's say you have a single inventory but want to split it between multiple shops. There might be overlap in the inventory, e.g. the US & EU shops share 80% of inventory, and then the rest is specific to either shop.

In this case, you can create the entire inventory in the default Channel and then assign the Products & ProductVariants to each Channel as needed, setting the price as appropriate for the currency used by each shop.

Multi-vendor marketplace

This is the most advanced use of channels. For a detailed guide to this use-case, see our Multi-vendor marketplace guide.

Specifying channel in the GraphQL API

To specify which channel to use when making an API call, set the 'vendure-token' header to match the token of the desired Channel.

For example, if we have a UK Channel with the token set to "uk-channel" as shown in this screenshot:

Then we can make a GraphQL API call to the UK Channel by setting the 'vendure-token' header to 'uk-channel':

With the above header set, the API call will be made to the UK Channel, and the response will contain only the entities which are assigned to that Channel.