clean and refine product docs structure
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<title>4. Search & Matching — Balinyaar docs</title>
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<a class="brand" href="../index.html"><span class="dot"></span> Balinyaar docs</a>
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<p class="tagline">Trust-first home-nursing marketplace · Iran</p>
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<nav><div class="group"><div class="label">Start here</div><ul><li><a href="../index.html">Docs home</a></li><li><a href="../overview/platform-summary.html">Platform summary & ground truths</a></li></ul></div><div class="group"><div class="label">Business requirements</div><ul><li><a href="index.html">Overview & MVP scope</a></li><li><a href="01-actors-and-onboarding.html">1. Actors & onboarding</a></li><li><a href="02-nurse-verification.html">2. Nurse verification</a></li><li><a href="03-service-catalog-and-pricing.html">3. Service catalog & pricing</a></li><li><a class="active" href="04-search-and-matching.html">4. Search & matching</a></li><li><a href="05-booking-and-scheduling.html">5. Booking & scheduling</a></li><li><a href="06-evv-and-service-delivery.html">6. EVV / service delivery</a></li><li><a href="07-cancellation-and-refunds.html">7. Cancellation & refunds</a></li><li><a href="08-payments-and-escrow.html">8. Payments & escrow</a></li><li><a href="09-installments-bnpl.html">9. Installments / BNPL</a></li><li><a href="10-payouts.html">10. Payouts to nurses</a></li><li><a href="11-reviews-trust-and-safety.html">11. Reviews, trust & safety</a></li><li><a href="12-messaging-and-emergencies.html">12. Messaging & emergencies</a></li><li><a href="13-tax-invoicing-and-legal.html">13. Tax, invoicing & legal</a></li><li><a href="14-notifications-and-admin.html">14. Notifications & admin</a></li></ul></div><div class="group"><div class="label">Database model</div><ul><li><a href="../data-model/index.html">Overview & decisions</a></li><li><a href="../data-model/diagrams.html">Diagrams</a></li><li><a href="../data-model/01-identity-and-access.html">1. Identity & access</a></li><li><a href="../data-model/02-geography.html">2. Geography</a></li><li><a href="../data-model/03-services-and-pricing.html">3. Services & pricing</a></li><li><a href="../data-model/04-verification-and-credentials.html">4. Verification & credentials</a></li><li><a href="../data-model/05-booking-and-scheduling.html">5. Booking & scheduling</a></li><li><a href="../data-model/06-payments-ledger-and-refunds.html">6. Payments, ledger & refunds</a></li><li><a href="../data-model/07-payouts.html">7. Payouts</a></li><li><a href="../data-model/08-bnpl.html">8. BNPL / installments</a></li><li><a href="../data-model/09-messaging.html">9. Messaging</a></li><li><a href="../data-model/10-reviews-and-records.html">10. Reviews & records</a></li><li><a href="../data-model/11-notifications.html">11. Notifications</a></li><li><a href="../data-model/12-audit-config-and-reference.html">12. Audit, config & reference</a></li><li><a href="../data-model/13-partner-centers-and-future.html">13. Partner centers & future</a></li></ul></div><div class="group"><div class="label">Payments deep-dive</div><ul><li><a href="../payments/index.html">Overview & exec summary</a></li><li><a href="../payments/iranian-payment-reality.html">Iranian payment reality</a></li><li><a href="../payments/escrow-ledger.html">Escrow as a ledger</a></li><li><a href="../payments/bnpl-landscape.html">BNPL landscape & finding</a></li><li><a href="../payments/cancellation-and-payout.html">Cancellation & nurse payout</a></li><li><a href="../payments/integration-notes.html">Integration & schema touchpoints</a></li><li><a href="../payments/sources.html">Recommendations & sources</a></li></ul></div><div class="group"><div class="label">Research & strategy</div><ul><li><a href="../research/index.html">Overview & exec summary</a></li><li><a href="../research/market-and-competitors.html">Market & competitors</a></li><li><a href="../research/problems-and-risks.html">Problems & risks</a></li><li><a href="../research/verification.html">Verification (research)</a></li><li><a href="../research/legal-landscape.html">Legal landscape</a></li><li><a href="../research/go-to-market.html">Go-to-market & sources</a></li></ul></div><div class="group"><div class="label">Notes & more</div><ul><li><a href="../notes/open-questions.html">Open questions</a></li><li><a href="../notes/future-ideas.html">Future ideas</a></li><li><a href="../wireframes/index.html">Wireframes</a></li><li><a href="../fa/index.html">Farsi documents</a></li></ul></div></nav>
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<h1 id="4-search-matching">4. Search & Matching</h1>
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<p><a href="index.html">← Business Requirements</a></p>
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<h2 id="a-business-requirements">(a) Business requirements <a class="anchor" href="#a-business-requirements" aria-hidden="true">#</a></h2>
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<ul>
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<li>Families search by <strong>service category</strong>, <strong>geography</strong> (city, and optionally district), price, and availability, with results sortable by rating.</li>
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<li><strong>Geography</strong> is driven by nurse-declared <strong>service areas</strong>: a nurse covers one or more cities, optionally specific districts; a city-level row (no district) means the whole city.</li>
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<li><strong>Search must be cheap from day one.</strong> The naive query joins nurse profile (verified + accepting) → variants (category/price) → variant options → service areas → rating across 4+ tables. Instead a <strong>denormalized <code>nurse_search_index</code></strong> holds one flat row per active, bookable variant with all search-relevant fields, maintained on write. A row exists <strong>only</strong> when the nurse is <code>is_verified</code> and not suspended and the variant <code>is_active</code>. This is far cheaper than introducing Elasticsearch at MVP stage.</li>
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<li><strong>Same-gender caregiver matching</strong> is a first-class filter and a near-hard requirement: in Iranian bodily-care (bathing, toileting, intimate post-surgical care) same-gender caregiving is culturally decisive, not optional. The customer specifies a required caregiver gender on the booking request (<code>required_caregiver_gender</code>), and nurse gender is an exposed search filter so families can narrow to same-gender caregivers up front. The patient's gender (<code>patients.gender</code>) and the nurse's gender support this matching.</li>
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</ul>
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<h2 id="b-iran-specific-considerations">(b) Iran-specific considerations <a class="anchor" href="#b-iran-specific-considerations" aria-hidden="true">#</a></h2>
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<ul>
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<li>District granularity varies: in Tehran, districts map to the 22 official municipal مناطق; in smaller cities they are major neighborhoods. Districts are optional.</li>
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<li><strong>Same-gender matching is the single most Iran-specific matching constraint</strong> — every real elder/post-surgical bodily-care request implies it. It must be surfaced before booking, not discovered after.</li>
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<li>White-space opportunity: incumbents concentrate ~99% in Tehran/Karaj; the search/area model must work for under-served second-tier cities (Mashhad, Isfahan, Shiraz, Tabriz, Ahvaz, Qom).</li>
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</ul>
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<h2 id="c-mvp-vs-deferred">(c) MVP vs DEFERRED <a class="anchor" href="#c-mvp-vs-deferred" aria-hidden="true">#</a></h2>
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<ul>
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<li><strong>MVP:</strong> category + city/district geo search; <code>nurse_search_index</code> denormalization; same-gender filter via <code>required_caregiver_gender</code>; rating sort.</li>
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<li><strong>DEFERRED:</strong> map-based discovery; availability-window filtering as a hard constraint (availability slots are soft guidance at launch); algorithmic ranking beyond rating; continuity-of-carer "preferred nurse" suggestions.</li>
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</ul>
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<h2 id="d-supporting-database-entities">(d) Supporting database entities <a class="anchor" href="#d-supporting-database-entities" aria-hidden="true">#</a></h2>
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<p><code>nurse_service_areas</code>, <code>cities</code>, <code>districts</code>, <strong><code>nurse_search_index</code></strong>, <code>nurse_service_variants</code>, <code>nurse_profiles</code> (rating, gender via <code>users</code>), <code>patients.gender</code>; <code>booking_requests.required_caregiver_gender</code> (the requested constraint).</p>
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<blockquote><p><strong>Related:</strong> Data model — <a href="../data-model/03-services-and-pricing.html">Services & Pricing</a>.</p>
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</blockquote>
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