How do you prevent fields from interfering with each other when using a shared content model across multiple sites?

How do you prevent fields from interfering with each other when using a shared content model across multiple sites? The principle is to only place the shared aspects at the structural level, with differences left at the value level: the model and field names are consistent across all sites, default values, option sets, and display text are configured separately for each site, and the keyword library is maintained separately for each site. AnQiCMS's multi-site management supports maintaining multiple independent sites on a single backend, suitable for multi-brand and multi-theme scenarios. The customizable content model can flexibly define the content structure, and when used together, it is necessary to define clear boundaries.

Which layer is being shared?

A content model commonly used items are divided into three categories: field names and types, field and template value relationships, and business significance of fields. These three categories are suitable for unification because they determine whether interfaces and templates can be reused. Items not suitable for sharing are default values, optional values, display text, and validation rules, which are the landing points of brand and regional differences.

Misplacing boundaries can lead to two symptoms: one is that fields with the same name have different meanings on different sites, the interface output is normal but the content is confused; the other is that a separate model is built for each site, the template cannot be reused, and the maintenance volume grows linearly with the number of sites.

Boundary of field naming and default values

It is recommended to name according to 'business object plus attribute', without site prefix or color and other visual information. The practice of putting the site name in the field prefix can distinguish in the short term, but in the long run, it will cause the same template to take different field names in two sites.

Differences should be handled by the configuration layer instead of new fields:

• Option collection fields (such as status, category) should keep the field name and type unchanged, and the option content should be configured according to the site;
• The default value takes effect only when new content is added, do not use the default value as a site switch;
• The change of mandatory fields should assess historical content, arbitrarily changing empty fields in existing sites to mandatory will cause editing actions of old content to fail;
• For copywriting fields left blank, use the display layer as a fallback instead of duplicating it in each site.

The keyword library is separated by site

The keyword library centrally manages SEO keywords, and under multiple sites, they should be maintained separately by site. Centralized management solves the problem of having an editing entry in one backend, but does not mean that different brands can share the same batch of words. The consequence of sharing is that the automatic rules will fall the keywords of the main site onto the content of the sub-sites, causing the anchor text and description to be misaligned.

The same approach also applies to columns and tags: the naming is unified, and specific entries are maintained according to the site. Content that needs to be reused across sites should be carried by independent documents, not maintained by copying and pasting two copies.

The verification sequence of the impact of changes

The verification of field changes should be traced back by reference relationship. First confirm which templates use this field and which interfaces output it, then decide on the change method: renaming or deleting is a destructive change, which requires updating the templates and interface call parties at the same time; adding a new field is a compatible change, but it is necessary to check the performance of the default value on old content.

The station-level operation is also constrained at the interface layer. The MCP interface sets the exposure range according to the intent domain, and capabilities such as backup, upgrade, and multi-site are turned off by default (DefaultOff), and need to be explicitly enabled. Cross-site changes will not affect all sites simultaneously due to a single accidental call.

It is recommended to follow a fixed sequence of four steps: first, make changes in a single site and verify the rendering and interface output; then repeat on the second site to confirm that all differences are in the configuration layer; next, check if the path for batch import and interface writing is normal under the new field structure; finally, record the changes in the change list, indicating the affected sites and rollback methods.

Common questions

Question: When the number of sites is large, should the model be split?Look at the difference ratio. If the field set has a high degree of overlap, continue to use a common set and leave the differences in the configuration; when the structural difference of a site is obvious, it is better to build a separate model for it than to insert conditional branches in the common model, which is more maintainable.

What are the safe practices for renaming fields?Add the target field, cut the template and interface references to the new field, and then disable the old field after checking for errors. Do this in three steps to avoid interrupting rendering and interfaces with one-time changes.

Should the column names be unified across multiple sites?It is recommended to unify the structure name, allowing different display names. Unifying names allows templates and interfaces to be reused, while display names are left for brand differentiation.